wordsearch space solution

from sys import argv
script, banned_word, phrase = argv
banned_word = banned_word.lower()
old_banned_word = banned_word
phrase = phrase.lower()
split_phrases = phrase.split()
for thing in split_phrases:
    print "Banned word: %s" % banned_word
    if not banned_word.startswith(thing):
        banned_word = old_banned_word
        continue
    else:
        if len(banned_word) == len(thing):
            print "Success"
            break
        else:
            banned_word = banned_word[len(thing):]