COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
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C00004 ENDMK
C⊗;
$$\vjust{\halign{#⊗#⊗#⊗#\cr
$\bullet$ ⊗$\bullet$ ⊗$\bullet$ ⊗$\bullet$\cr
$\bullet$ ⊗⊗⊗$\bullet$\cr
$\bullet$ ⊗⊗⊗$\bullet$\cr
$\bullet$ ⊗$\bullet$ ⊗\bullet$ \cr}}$$
! You can't do that in restricted horizontal mode.
p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet
$ \cr}}$$

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Type <cr> to continue, <lf> to flash error messages,
	1 or ... or 9 to ignore the next 1 to 9 tokens of input,
	i or I to insert something, e or E to edit, x or X to quit.
↑i
*$

! You can't do that in restricted horizontal mode.
p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet$
 \cr}}$$

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! Missing $ inserted.
<to be read again> 
\ENDV
<vlist> \ENDV

p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet$ \cr
}}$$

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! Missing $ inserted.
<to be read again> 
\ENDV
<vlist> \ENDV

p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet$ \cr
}}$$

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! Missing $ inserted.
<to be read again> 
\ENDV
<vlist> \ENDV

p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet$ \cr
}}$$

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! Missing $ inserted.
<to be read again> 
\ENDV
<vlist> \ENDV

p.4,l.108 $\bullet$ ⊗$\bullet$ ⊗\bullet$ \cr
}}$$

↑e