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:
decent, well, flaxen, fair, unjust

Ex Output:
flaxen


Ex Input:
smooshed, horizontal, condominium, flat, valley

Ex Output:
condominium


Ex Input:
duck, stoop, sheep, goose, elephant

Ex Output:

stoop