<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">% This is LETTER.STY in text format, as of April, 14, 1988,                     
% by D. Heinrich (TH Karlsruhe).                                                
%                                                                               
% Last modified May, 04, 1988.                                                  
%                                                                               
% According to the german DIN.                                                  
% It gives the possibility to add a backaddress to the information              
% given in the window and to include a huge address (sender).                   
% \windowrules and \nowindowrules are possible.                                 
% It's also possible to adapt captions to other languages.                      
%                                                                               
% It is based on A4LETTER.STY in text format, as of June 16, 1987.              
% letter.sty 17-Jan-86 with modifications                                       
% for DIN-A4 paper + window envelopes, by H.Partl (Wien)                        
%                                                                               
                                                                                
\typeout{}                                                                      
\typeout{Document Style `letter'.}                                              
\typeout{Modified at University of Karlsruhe - 04. May 1988.}                   
\typeout{}                                                                      
\typeout{If you really want to use Lamport's original letter format,}           
\typeout{please use the style `aletter'.}                                       
\typeout{}                                                                      
                                                                                
{\catcode`\_=12 \gdef\jobname@aux{\jobname.aux}} % .aux or _aux or ...          
                                                                                
\def\@ptsize{0}                                                                 
\@namedef{ds@10pt}{\def\@ptsize{0}}                                             
\@namedef{ds@11pt}{\def\@ptsize{1}}                                             
\@namedef{ds@12pt}{\def\@ptsize{2}}                                             
\@twosidefalse                                                                  
\def\ds@draft{\overfullrule 5pt}                                                
                                                                                
\@options                                                                       
                                                                                
\lineskip 1pt \normallineskip 1pt                                               
\def\baselinestretch{1}                                                         
                                                                                
\ifcase \@ptsize\relax                                                          
 \def\@normalsize{\@setsize\normalsize{12pt}\xpt\@xpt                           
  \abovedisplayskip 10pt plus2pt minus5pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6pt plus3pt minus3pt}                                  
 \def\small{\@setsize\small{11pt}\ixpt\@ixpt                                    
  \abovedisplayskip 8.5pt plus 3pt minus 4pt                                    
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus2pt                                            
  \belowdisplayshortskip 4pt plus2pt minus 2pt}                                 
 \def\footnotesize{\@setsize\footnotesize{9.5pt}\viiipt\@viiipt                 
  \abovedisplayskip 6pt plus 2pt minus 4pt                                      
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus 1pt                                           
  \belowdisplayshortskip 3pt plus 1pt minus 2pt}                                
 \def\scriptsize{\@setsize\scriptsize{8pt}\viipt\@viipt}                        
 \def\tiny{\@setsize\tiny{6pt}\vpt\@vpt}                                        
 \def\large{\@setsize\large{14pt}\xiipt\@xiipt}                                 
 \def\Large{\@setsize\Large{18pt}\xivpt\@xivpt}                                 
 \def\LARGE{\@setsize\LARGE{22pt}\xviipt\@xviipt}                               
 \def\huge{\@setsize\huge{25pt}\xxpt\@xxpt}                                     
 \def\Huge{\@setsize\Huge{30pt}\xxvpt\@xxvpt}                                   
\or                                                                             
 \def\@normalsize{\@setsize\normalsize{13.6pt}\xipt\@xipt                       
  \abovedisplayskip 11pt plus3pt minus6pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6.5pt plus3.5pt minus3pt}                              
 \def\small{\@setsize\small{12pt}\xpt\@xpt                                      
  \abovedisplayskip 10pt plus2pt minus5pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6pt plus3pt minus3pt}                                  
 \def\footnotesize{\@setsize\footnotesize{11pt}\ixpt\@ixpt                      
  \abovedisplayskip 8pt plus 2pt minus 4pt                                      
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus 1pt                                           
  \belowdisplayshortskip 4pt plus 2pt minus 2pt}                                
 \def\scriptsize{\@setsize\scriptsize{9.5pt}\viiipt\@viiipt}                    
 \def\tiny{\@setsize\tiny{7pt}\vipt\@vipt}                                      
 \def\large{\@setsize\large{14pt}\xiipt\@xiipt}                                 
 \def\Large{\@setsize\Large{18pt}\xivpt\@xivpt}                                 
 \def\LARGE{\@setsize\LARGE{22pt}\xviipt\@xviipt}                               
 \def\huge{\@setsize\huge{25pt}\xxpt\@xxpt}                                     
 \def\Huge{\@setsize\Huge{30pt}\xxvpt\@xxvpt}                                   
\or                                                                             
 \def\@normalsize{\@setsize\normalsize{15pt}\xiipt\@xiipt                       
  \abovedisplayskip 12pt plus3pt minus7pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6.5pt plus3.5pt minus3pt}                              
 \def\small{\@setsize\small{13.6pt}\xipt\@xipt                                  
  \abovedisplayskip 11pt plus3pt minus6pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6.5pt plus3.5pt minus3pt}                              
 \def\footnotesize{\@setsize\footnotesize{12pt}\xpt\@xpt                        
  \abovedisplayskip 10pt plus2pt minus5pt                                       
  \belowdisplayskip \abovedisplayskip                                           
  \abovedisplayshortskip \z@ plus3pt                                            
  \belowdisplayshortskip 6pt plus3pt minus3pt}                                  
 \def\scriptsize{\@setsize\scriptsize{9.5pt}\viiipt\@viiipt}                    
 \def\tiny{\@setsize\tiny{7pt}\vipt\@vipt}                                      
 \def\large{\@setsize\large{18pt}\xivpt\@xivpt}                                 
 \def\Large{\@setsize\Large{22pt}\xviipt\@xviipt}                               
 \def\LARGE{\@setsize\LARGE{25pt}\xxpt\@xxpt}                                   
 \def\huge{\@setsize\huge{30pt}\xxvpt\@xxvpt}                                   
 \let\Huge=\huge                                                                
\fi                                                                             
                                                                                
\normalsize                                                                     
                                                                                
% \oddsidemargin 53pt \evensidemargin 53pt                                      
% \marginparwidth 90pt \marginparsep 11pt                                       
% \marginparpush 5pt \topmargin 27pt                                            
% \headheight 12pt \headsep 45pt                                                
% \footheight 12pt \footskip 25pt                                               
% \textheight 505pt \textwidth 365pt                                            
% \columnsep 10pt \columnseprule 0pt                                            
% The above values (letter.sty) are replaced by the following values:           
                                                                                
\oddsidemargin 0in                                                              
\evensidemargin 0in                                                             
\marginparwidth .08in                                                           
\marginparsep .01in                                                             
\marginparpush 5pt                                                              
\topmargin -35pt                                                                
\headheight 12pt                                                                
\headsep 25pt                                                                   
\footheight 12pt                                                                
\footskip 25pt                                                                  
\textheight 8.9in                                                               
\textwidth 6.5in                                                                
\columnsep 10pt                                                                 
\columnseprule 0pt                                                              
% (Note that these new values use all of the paper, like in Plain TeX,          
% but disable the writing of marginpar's.                                       
                                                                                
\raggedbottom                                                                   
                                                                                
\footnotesep 12pt                                                               
\skip\footins 10pt plus 2pt minus 4pt                                           
                                                                                
\floatsep 12pt plus 2pt minus 2pt                                               
\textfloatsep 20pt plus 2pt minus 4pt                                           
\intextsep 12pt plus 2pt minus 2pt                                              
\dblfloatsep 12pt plus 2pt minus 2pt                                            
\dbltextfloatsep 20pt plus 2pt minus 4pt                                        
\@maxsep 20pt                                                                   
\@dblmaxsep 20pt                                                                
\@fptop 0pt plus 1fil                                                           
\@fpsep 8pt plus 2fil                                                           
\@fpbot 0pt plus 1fil                                                           
\@dblfptop 0pt plus 1fil                                                        
\@dblfpsep 8pt plus 2fil                                                        
\@dblfpbot 0pt plus 1fil                                                        
                                                                                
% window for toaddress                                                          
\def\@windowrules#1{\gdef\@@windowrules{#1}}                                    
\def\windowrules{\@windowrules{yes}}                                            
\def\nowindowrules{\@windowrules{}}                                             
\windowrules                                                                    
                                                                                
\def\backaddress#1{\gdef\@backaddress{#1}}                                      
\backaddress{}                                                                  
                                                                                
% \opening is quite different from the original one:                            
\def\opening#1{\thispagestyle{empty}                                            
 \vspace*{-2cm} % upper edge of window &lt;----                                    
 \ifx\@empty\fromaddress \else                                                  
    \setbox0=\vbox{\raggedright \fromaddress \par \bigskip}                     
    \vbox{\raggedright \fromaddress \par \bigskip}                              
    \vspace{-\ht0}                                                              
    \vspace{-\dp0}                                                              
    \vspace{2.25cm}                                                             
    \ifx\@empty\@@windowrules \hrule width 0pt                                  
       \else \hrule width 8cm                                                   
    \fi                                                                         
    \ifx\@empty\@backaddress \else                                              
       \vspace{.75cm}                                                           
       \setbox1=\vbox{                                                          
        \hbox to 8cm{\hss{\scriptsize \@backaddress}\hss}}                      
       \vbox{                                                                   
        \hbox to 8cm{\hss{\scriptsize \@backaddress}\hss}                       
        \hrule width 8cm}                                                       
       \vspace{-\ht1}                                                           
       \vspace{-\dp1}                                                           
       \hrule width 0pt                                                         
    \fi                                                                         
 \fi                                                                            
 \ifx\@empty\@backaddress \vspace{5cm} \else % height of window &lt;----           
    \vspace{4.25cm} % height of window &lt;----                                    
 \fi                                                                            
 \vbox to 0pt{\vss \raggedright \toname \\ \toaddress \par                      
       \vspace{.75cm}} % vorher .25cm + \bigskip                                
 \ifx\@empty\fromaddress \else                                                  
    \ifx\@empty\@@windowrules \hrule width 0pt                                  
       \else \hrule width 8cm                                                   
    \fi                                                                         
    \vspace{0.85cm}% vorher 1.4cm                                               
    \hspace*{-2cm}\vbox{\hrule width .3cm}\par                                  
 \fi                                                                            
 \vspace{1cm}                                                                   
 {\raggedleft \@place\space\@date \par}                                         
 \medskip                                                                       
 \vspace{0pt plus 1cm} % to help with page break                                
 #1\par\nobreak}                                                                
                                                                                
\long\def\closing#1{\par\nobreak\vspace{\parskip}                               
 \stopbreaks                                                                    
 {\raggedright                                                                  
  \ignorespaces #1\\[6\parskip]                                                 
  \ifx\@empty\fromsig                                                           
  \fromname                                                                     
  \else \fromsig \fi\strut}                                                     
  \par\bigskip}                                                                 
                                                                                
%\def\ps{\par\startbreaks}                                                      
\def\ps#1{\par\noindent                                                         
 \parbox[t]{\textwidth}{\@hangfrom{\rm P.S.: }%                                 
 \ignorespaces #1\strut}\par}                                                   
\def\cc#1{\par\noindent                                                         
 \parbox[t]{\textwidth}{\@hangfrom{\rm \ccname: }% &lt;-----                       
 \ignorespaces #1\strut}\par}                                                   
\def\ccname{cc} % &lt;-----                                                        
\def\encl#1{\par\noindent                                                       
 \parbox[t]{\textwidth}{\@hangfrom{\rm \enclname: }% &lt;-----                     
 \ignorespaces #1\strut}\par}                                                   
\def\enclname{encl} % &lt;-----                                                    
\def\stopletter{}                                                               
                                                                                
\def\returnaddress{}                                                            
\newcount\labelcount                                                            
\def\place#1{\gdef\@place{#1,}}                                                 
\def\@place{}                                                                   
\def\date#1{\gdef\@date{#1}}                                                    
\def\@date{\today}                                                              
                                                                                
\def\startlabels{                                                               
 \labelcount=0 \baselineskip=0pt \lineskip=0pt                                  
 \pagestyle{empty}                                                              
 \let\@texttop=\relax                                                           
 \topmargin -50pt                                                               
 \headsep 0pt                                                                   
 \oddsidemargin -35pt                                                           
 \evensidemargin -35pt                                                          
 \textheight 10in                                                               
 \@colht\textheight \@colroom\textheight \vsize\textheight                      
 \textwidth 550pt                                                               
 \columnsep 25pt                                                                
 \xpt                                                                           
 \baselineskip=0pt                                                              
 \lineskip=0pt                                                                  
 \boxmaxdepth=0pt                                                               
 \twocolumn\relax}                                                              
\def\mlabel#1#2{\setbox0\vbox{\parbox[b]{3.6in}{%                               
 \strut\ignorespaces #2}}                                                       
 \vbox to 2in{\vss \box0 \vss}}                                                 
                                                                                
                                                                                
                                                                                
\long\def\letter#1{\clearpage                                                   
 \c@page\@ne                                                                    
 \interlinepenalty=200 \@processto{#1}}                                         
\def\endletter{\stopletter\@@par\pagebreak\@@par                                
 \if@filesw                                                                     
 \begingroup                                                                    
 \def\protect{\string}                                                          
 \let\\=\relax                                                                  
 \def\protect##1{\string##1\space}                                              
 \immediate\write\@auxout{\string\mlabel{\returnaddress}{\toname                
 \\\toaddress}}                                                                 
 \endgroup                                                                      
 \fi}                                                                           
\long\def\@processto#1{\@xproc #1\\@@@\ifx\toaddress\@empty                     
 \else \@yproc #1@@@\fi}                                                        
\long\def\@xproc #1\\#2@@@{\def\toname{#1}\def\toaddress{#2}}                   
\long\def\@yproc #1\\#2@@@{\def\toaddress{#2}}                                  
\def\stopbreaks{\interlinepenalty \@M                                           
 \def\par{\@@par\nobreak}\let\\=\@nobreakcr                                     
 \let\vspace\@nobreakvspace}                                                    
\def\@nobreakvspace{\@ifstar{\@nobreakvspacex}{\@nobreakvspacex}}               
\def\@nobreakvspacex#1{\ifvmode\nobreak\vskip #1\relax\else                     
 \@bsphack\vadjust{\nobreak\vskip #1}\@esphack\fi}                              
\def\@nobreakcr{\vadjust{\penalty\@M}\@ifstar{\@xnewline}{\@xnewline}}          
\def\startbreaks{\let\\=\@normalcr                                              
 \interlinepenalty 200\def\par{\@@par\penalty 200}}                             
                                                                                
\def\name#1{\def\fromname{#1}}                                                  
\def\fromname{}                                                                 
\def\signature#1{\def\fromsig{#1}}                                              
\def\fromsig{}                                                                  
\long\def\address#1{\def\fromaddress{#1}}                                       
\def\fromaddress{}                                                              
\def\location#1{\def\fromlocation{#1}}                                          
\def\fromlocation{}                                                             
\def\telephone#1{\def\telephonenum{#1}}                                         
\def\telephonenum{}                                                             
                                                                                
\def\document{\endgroup                                                         
 \@colht\textheight \@colroom\textheight \vsize\textheight                      
 \columnwidth\textwidth \@clubpenalty\clubpenalty                               
 \if@twocolumn \advance\columnwidth -\columnsep                                 
 \divide\columnwidth\tw@ \hsize\columnwidth \@firstcolumntrue                   
 \fi                                                                            
 \hsize\columnwidth \linewidth\hsize                                            
 \begingroup\@floatplacement\@dblfloatplacement\endgroup                        
 \if@filesw \immediate\openout\@mainaux=\jobname@aux                            
 \immediate\write\@mainaux{\string\startlabels\string\@startlabels}\fi          
 \def\do##1{\let ##1\@notprerr}                                                 
 \@preamblecmds                                                                 
 \let\do\noexpand                                                               
 \@normalsize\everypar{}}                                                       
\def\enddocument{\@checkend{document}\newpage\begingroup                        
 \if@filesw \immediate\closeout\@mainaux                                        
 \makeatletter\input \jobname@aux\clearpage                                     
 \fi\endgroup\deadcycles\z@\@@end}                                              
                                                                                
\def\makelabels{\@fileswtrue}                                                   
\def\@startlabels{}                                                             
                                                                                
                                                                                
                                                                                
% \def\@texttop{\ifnum\c@page=1\vskip 0pt plus .00006fil\relax\fi}              
\let\@texttop=\relax                                                            
                                                                                
\def\ps@headings{                                                               
 \def\@oddhead{\sl \headtoname\ \ignorespaces\toname \hfil \today % &lt;--         
 \hfil Seite \thepage}\def\@oddfoot{}}                                          
\def\headtoname{To} % &lt;-----                                                    
\def\ps@empty{                                                                  
 \def\@oddhead{}\def\@oddfoot{}\def\@evenhead{}\def\@evenfoot{}}                
                                                                                
\def\ps@firstpage{\def\@oddhead{}\def\@oddfoot{\raisebox                        
 {-45pt}[0pt]{\hbox to \textwidth                                               
 {\hspace*{100pt}\xpt\fromlocation \hfill                                       
 \telephonenum}}\hss}\def\@evenhead{}\def\@evenfoot{}}                          
                                                                                
\def\ps@plain{                                                                  
 \def\@oddhead{}\def\@oddfoot{\rm\hfil\thepage                                  
 \hfil}\def\@evenhead{}\let\@evenfoot\@oddfoot}                                 
                                                                                
\parskip .7em                                                                   
\parindent 0pt                                                                  
\topsep .4em                                                                    
\partopsep 0pt                                                                  
\itemsep .4em                                                                   
                                                                                
\@lowpenalty 51 \@medpenalty 151 \@highpenalty 301                              
\@beginparpenalty -\@lowpenalty                                                 
\@endparpenalty -\@lowpenalty                                                   
\@itempenalty -\@lowpenalty                                                     
                                                                                
                                                                                
                                                                                
\leftmargini 2.5em                                                              
\leftmarginii 2.2em                                                             
\leftmarginiii 1.87em                                                           
\leftmarginiv 1.7em                                                             
\leftmarginv 1em                                                                
\leftmarginvi 1em                                                               
\leftmargin\leftmargini                                                         
\labelwidth\leftmargini\advance\labelwidth-\labelsep                            
\labelsep 5pt                                                                   
\parsep 0pt                                                                     
                                                                                
\let\@listi\relax                                                               
\def\@listii{\leftmargin\leftmarginii                                           
 \labelwidth\leftmarginii\advance\labelwidth-\labelsep}                         
\def\@listiii{\leftmargin\leftmarginiii                                         
 \labelwidth\leftmarginiii\advance\labelwidth-\labelsep                         
 \topsep .2em                                                                   
 \itemsep \topsep}                                                              
\def\@listiv{\leftmargin\leftmarginiv                                           
 \labelwidth\leftmarginiv\advance\labelwidth-\labelsep}                         
\def\@listv{\leftmargin\leftmarginv                                             
 \labelwidth\leftmarginv\advance\labelwidth-\labelsep}                          
\def\@listvi{\leftmargin\leftmarginvi                                           
 \labelwidth\leftmarginvi\advance\labelwidth-\labelsep}                         
                                                                                
\def\labelenumi{\arabic{enumi}.}                                                
\def\theenumi{\arabic{enumi}}                                                   
\def\labelenumii{(\alph{enumii})}                                               
\def\theenumii{\alph{enumii}}                                                   
\def\p@enumii{\theenumi}                                                        
\def\labelenumiii{\roman{enumiii}.}                                             
\def\theenumiii{\roman{enumiii}}                                                
\def\p@enumiii{\theenumi(\theenumii)}                                           
\def\labelenumiv{\Alph{enumiv}.}                                                
\def\theenumiv{\Alph{enumiv}}                                                   
\def\p@enumiv{\p@enumiii\theenumiii}                                            
                                                                                
\def\labelitemi{$\bullet$}                                                      
\def\labelitemii{\bf --}                                                        
\def\labelitemiii{$\ast$}                                                       
\def\labelitemiv{$\cdot$}                                                       
                                                                                
\def\verse{\let\\=\@centercr                                                    
 \list{}{\itemsep\z@ \itemindent -15pt\listparindent \itemindent                
 \rightmargin\leftmargin\advance\leftmargin 15pt}\item[]}                       
\let\endverse\endlist                                                           
\def\quotation{\list{}{\listparindent 1.5em                                     
 \itemindent\listparindent                                                      
 \rightmargin\leftmargin}\item[]}                                               
\let\endquotation=\endlist                                                      
\def\quote{\list{}{\rightmargin\leftmargin}\item[]}                             
\let\endquote=\endlist                                                          
                                                                                
\def\descriptionlabel#1{\hspace\labelsep \bf #1}                                
\def\description{\list{}{\labelwidth\z@ \itemindent-\leftmargin                 
 \let\makelabel\descriptionlabel}}                                              
\let\enddescription\endlist                                                     
                                                                                
                                                                                
\def\theequation{\arabic{equation}}                                             
                                                                                
\arraycolsep 5pt                                                                
\tabcolsep 6pt                                                                  
\arrayrulewidth .4pt                                                            
\doublerulesep 2pt                                                              
\tabbingsep \labelsep                                                           
\skip\@mpfootins = \skip\footins                                                
\fboxsep = 3pt \fboxrule = .4pt                                                 
                                                                                
\def\footnoterule{\kern-1\p@                                                    
 \hrule width .4\columnwidth                                                    
 \kern .6\p@}                                                                   
                                                                                
\long\def\@makefntext#1{\noindent \hangindent 5pt\hbox                          
 to 5pt{\hss $~{\@thefnmark}$}#1}                                               
                                                                                
                                                                                
\c@topnumber=2                                                                  
\def\topfraction{.7}                                                            
\c@bottomnumber=1                                                               
\def\bottomfraction{.3}                                                         
\c@totalnumber=3                                                                
\def\textfraction{.2}                                                           
\def\floatpagefraction{.5}                                                      
\c@dbltopnumber= 2                                                              
\def\dbltopfraction{.7}                                                         
\def\dblfloatpagefraction{.5}                                                   
                                                                                
\def\today{\ifcase\month\or                                                     
 January\or February\or March\or April\or May\or June\or                        
 July\or August\or September\or October\or November\or December\fi              
 \space\number\day, \number\year}                                               
                                                                                
                                                                                
\smallskipamount=.5\parskip                                                     
\medskipamount=\parskip                                                         
\bigskipamount=2\parskip                                                        
                                                                                
\ps@plain                                                                       
\pagenumbering{arabic}                                                          
\onecolumn                                                                      
\@fileswfalse                                                                   
                                                                                
</pre></body></html>