*\input tmp
 (tmp.TEX 1 (basic.TEX 1 2 3 4)
\Scand #1->\if #1a{\a a}\else {\spose {\raise .375ex \hbox {\char '27}A}} 
#1←A
\spose #1->\hbox to 0pt{#1\hss }
#1←\raise .375ex \hbox {\char '27}A
⊗⊗⊗ horizontal, spacefactor 1.0000
\hbox( 8.5590 + .0000)x .0000, glueset-.0001
.\hbox( 6.9444 + .0000)x 7.2222, shifted-1.6146
..\:a '27
.\:a A
.\glue .0000 plus 100000.0000 minus 100000.0000
\glue 3.3333 plus 1.6667 minus 1.1111
\:a B
⊗⊗⊗ vertical
\glue .0000 plus 1.0000
⊗⊗⊗ current page:
⊗⊗⊗ nesting level 0
! OK.
p.1,l.5 \noindent\Scand A B\ddt
                               
↑x
Type x again to exit:
No output file.