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:
cool, fair, light, fine, level

Ex Output:
fine


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

Ex Output:
condominium


Ex Input:
hard, firm, rough, resistant, concerted

Ex Output:

concerted