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:
fawn, social, cub, kid, colt

Ex Output:
social


Ex Input:
suppressed, fawn, follow, cajole, kitten

Ex Output:
kitten


Ex Input:
sea turtle, whale, dog, fish, hunting

Ex Output:

hunting