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:
stormy, fair, just, mild, brisk

Ex Output:
just


Ex Input:
ugly, absorption, vitamin c, fat, thin

Ex Output:
vitamin c


Ex Input:
kayak, trap, hamster, fish, row

Ex Output:

hamster