COMMENT ⊗   VALID 00004 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	%\read16 to\pagenumber
C00003 00003	\ninepoint
C00005 00004	% now we print the answers, if any
C00006 ENDMK
C⊗;
%\read16 to\pagenumber
\input manmac
\tenpoint
\pageno=800
%\pageno=\pagenumber
\def\rhead{Experimental Pages for The \TeX book}
\def\chapno{ X}
{\catcode`\%=12 \immediate\write\ans{% Answers for galley proofs:}}
\ninepoint
The contents of a letter are typeset either in ``line mode'' (obeying lines)
or in ``paragraph mode'' (producing paragraphs in ↑{block style}). Control
sequences |\beginlinemode| and |\beginparmode| are defined to initiate these
modes; and another control sequence, |\endmode|, is defined and redefined so
that the current mode will terminate properly:

\bye
% now we print the answers, if any

% that blank line will stop an unfinished \answer
\immediate\closeout\ans
\vfill\eject
\ninepoint
\input answers
\bye