#!/bin/sh

if [ -z $1 ]; then

  echo "Where dictionary?"

  echo "Try $0 --help"

  exit 1

fi

if [ "$1" = --help ]; then

  echo Simple utility for searching word those not are in dictionary.

  echo Search done by grep.

  echo

  echo find-new-words DICTIONARY

  echo   words read from stdin

  echo

  echo find-new-words DICTIONARY WORDS_FILE

  echo   words read from file

  exit 0

fi

dictionary=$1

if [ -z "$2" ]; then

  while true; do

    if read word; then

      if grep $word $dictionary >/dev/null; then

        :;

      else

        echo $word;

      fi

    else

      exit 0

    fi

  done

else

  while true; do

    if read word; then

      if grep $word $dictionary >/dev/null; then

        :;

      else

        echo $word;

      fi

    else

      exit 0

    fi

  done <$2

fi