V7/usr/games/ching

Find at most related files.
including files from this version of Unix. 
cd /usr/games/ching.d
case $1 in
	[6-9]*)	set H=$1;shift;;
esac
if	test $H
then	phx $H | nroff $* macros -
else	cno | phx | nroff $* macros -
fi