COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	\input basic
C00003 ENDMK
C⊗;
\input basic
\trace'77777777
\def\array#1\\#2\endarray{\xdef\ident{#1}
\vcenter{\halign{\tabskip0pt\ident\ddt\cr#2\cr}}}
\def\c{\hfill$##$\hfill}
\def\\{\cr}
$\array\c\ddt\quad⊗\c\\
a⊗b\\
c⊗d\endarray$