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:
fish, bat, mice, dog, hiking

Ex Output:
hiking


Ex Input:
tone, just, equitable, fair, unprejudiced

Ex Output:
tone


Ex Input:
brownie, chocolate, truffles, replace, fudge

Ex Output:

replace