#/bin/csh -f
set tr=/usr/ucb/tr 
if ($#argv == 1) then
	$tr -cs  'A-Za-z' '\012'  $1 | sort | uniq > /tmp/spell.$$  
else
	$tr -cs  'A-Za-z' '\012'  | sort | uniq > /tmp/spell.$$  
endif
comm -23 /tmp/spell.$$ /usr/dict/words
rm /tmp/spell.$$