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:
fire, instruct, inferno, retire, scold

Ex Output:
inferno


Ex Input:
hatchling, fawn, cute, kid, deer

Ex Output:
cute


Ex Input:
jog, duck, cow, ostrich, horse

Ex Output:

jog