\newcommand{\eseyear}{2023}

\newcommand{\ascii}{{\texttt{ascii}}}
\newcommand{\bafog}{BAföG}

\newcounter{linkcounter}
\newcommand\linklist{}
\makeatletter
\def\@breaklinklistat{21}
\def\@breaklinklistandat{56}
\newcommand{\link}[1]{%
    \edef\tmptoken{\detokenize{#1}}%
    \@ifundefined{nopanic@link@\tmptoken}{%
        \edef\@linknumber{\arabic{linkcounter}}%
        \protected@edef\@tmpkey{{\fontsize{9pt}{0}\selectfont\keys{\@linknumber}}}%
        \expandafter\global\expandafter\edef\csname nopanic@link@\tmptoken\endcsname{\arabic{linkcounter}}%
        %
        % Standard print output:
        \expandafter\g@addto@macro\expandafter\linklist\expandafter{\@tmpkey & \url{#1}}%
        \ifx\@breaklinklistat\@linknumber
            \g@addto@macro\linklist{\\}%
        \else
            \ifx\@breaklinklistandat\@linknumber
                \g@addto@macro\linklist{\\}%
            \else
                \g@addto@macro\linklist{\\*}%
            \fi
        \fi
        %
        % Link system output:
        \immediate\write\linklistfile{RewriteRule "^\@linknumber$" "#1" [NE,R,L]}%
        %
        \stepcounter{linkcounter}%
    }{%
        \protected@edef\@tmpkey{{\fontsize{9pt}{0}\selectfont\keys{\csname nopanic@link@\tmptoken\endcsname}}}%
    }%
    \href{#1}{\@tmpkey}%
}
\makeatother

\def\modulo#1#2{\ifnum#1=0 0\else(#1-#2*((2*#1-#2)/(2*#2)))\fi}