#!/bin/sh

if [ $# -ne 1 ]; then
  echo 'usage: primspell filename'
  exit 1
fi

( for i in `cat $1` ; do
    echo "$i"
    done ) | grep '^[A-Za-z]*$' > /tmp/$USER.$$

for i in `cat /tmp/$USER.$$` ; do
  j="a "`grep -i '^'$i'$' /usr/dict/words`
  if [ "$j" = "a " ]; then
    echo $i
  fi
done

/bin/rm -f /tmp/$USER.$$