The tracks are 2 em wide, but that depends on the body font size. Do
this in the right place so we don't have to hardcode (the wrong) width.
\voffset=-1in \topmargin=20mm \headheight=0mm \headsep=0mm
\textheight=\paperheight \advance\textheight by -2\topmargin
\voffset=-1in \topmargin=20mm \headheight=0mm \headsep=0mm
\textheight=\paperheight \advance\textheight by -2\topmargin
-\newdimen\titlewidth \titlewidth=0.5\textwidth \advance\titlewidth by -40pt
\pagestyle{empty}
\errorcontextlines=50
\pagestyle{empty}
\errorcontextlines=50
\lineskip=0pt
\footnotesize
\lineskip=0pt
\footnotesize
+\titlewidth=0.5\textwidth \advance\titlewidth by -4em
+
\global\def\\{&&&&&\cr}
\halign%
{\strut\hbox to \titlewidth{\qquad\ignorespaces#\unskip\hfil}%
\global\def\\{&&&&&\cr}
\halign%
{\strut\hbox to \titlewidth{\qquad\ignorespaces#\unskip\hfil}%