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:
deck, check, joker, board, bridge

Ex Output:
bridge


Ex Input:
fight, chips, deck, canvas, box

Ex Output:
chips


Ex Input:
cockroach, leap, drive, swim, fly

Ex Output:

drive