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:
air, fire, hire, ban, promote

Ex Output:
air


Ex Input:
entree, honest, loyalty, frank, fortitude

Ex Output:
entree


Ex Input:
joker, fold, check, deck, jab

Ex Output:

jab