\_checkloaded{lists}

\input pdfData/ptb-counters

\createcounter{list depth}
\_xp\def\csname liststyle1\endcsname{$\bullet$}
\_xp\def\csname liststyle2\endcsname{$\circ$}
\_xp\def\csname liststyle3\endcsname{$-$}
\def\blist{%
    \bgroup\par%
    \advancecounter{list depth}{1}%
    \def\item{%
        \par\egroup\bgroup\medskip\setbox0=\hbox{\csname liststyle\the\counter{list depth}\endcsname\quad}%
        \advance\leftskip by \dimexpr\wd0+\enumindent\relax\leavevmode\kern-\wd0\box0%
    }%
    \def\mtext{%
        \par\egroup\medskip\bgroup%
    }
    \bgroup%
}
\def\elist{\par\egroup\egroup\medskip}

\def\_numtoletter#1{\ifcase#1 0\or a\or b\or c\or d\or e\or f\or g\or h\or i\or j\or k\or l\or m\or n\or o\or p\or q\or r\or s\or t\or u\or v\or w\or x\or y\or z\else ---\fi}
\createcounter{enum count}
\createcounter{enum depth}
\_xp\def\csname enumstyle1\endcsname#1{{\bf(#1)}}
\_xp\setmacrotolen\_xp{\csname enumstyle1@wd\endcsname}{\csname enumstyle1\endcsname{20}}
\_xp\def\csname enumstyle2\endcsname#1{{\bf(\romannumeral#1)}}
\_xp\setmacrotolen\csname enumstyle2@wd\endcsname{\csname enumstyle2\endcsname{20}}
\_xp\def\csname enumstyle3\endcsname#1{{\bf(\_numtoletter{#1})}}
\_xp\setmacrotolen\csname enumstyle3@wd\endcsname{\csname enumstyle3\endcsname{20}}
\def\enumindent{.25cm}
\def\benum{\bgroup\par%
    \setcounter{enum count}{0}%
    \advancecounter{enum depth}{1}%
    \def\item{%
        \par\egroup\advancecounter{enum count}{1}\bgroup\medskip%
        \setbox0=\hbox{\hbox to\csname enumstyle\the\counter{enum depth}@wd\endcsname%
            {\hss\csname enumstyle\the\counter{enum depth}\endcsname{\the\counter{enum count}}}%
            \quad%
        }%
        \advance\leftskip by \dimexpr\wd0+\enumindent\relax\noindent\kern-\wd0\box0%
    }%
    \def\mtext{%
        \par\egroup\medskip\bgroup%
    }
    \bgroup%
}
\def\eenum{\par\egroup\egroup\par\medskip}