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verbs

echo -n "Would you like to play a game? "
read x

x=`echo $x | sed 's/[^-a-z0-9]//g'`

if [ -f /usr/games/$x ] ; then
	tput clear
	exec /usr/games/$x
else
	ls /usr/games
	exec cat <<QUOTE
A strange game.
The only winning move is
not to play.
QUOTE
fi
exit 0
Program names are generally verbs.

list this file, edit that file, gimp that image ... the program names are verbs.

Commands you type are also verbs.

Notice how verbs usually come first.