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:
provision, frank, hot dog, goodies, harsh

Ex Output:
harsh


Ex Input:
early, water, delayed, history, current

Ex Output:
water


Ex Input:
blocking, corner, deck, fight, hearts

Ex Output:

hearts