Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
club, hero, lettuce, bar, toast

Ex Output:
bar


Ex Input:
fair, pale, 70, clime, tangle

Ex Output:
pale


Ex Input:
ring, level, deck, caution, queen

Ex Output:

queen