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:
duck, bend, ostrich, jog, stoop

Ex Output:
ostrich


Ex Input:
tangle, fair, impartial, dishonest, balanced

Ex Output:
tangle


Ex Input:
well, arrest, annoyed, ok, fine

Ex Output:

arrest