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:
recruit, replace, sack, heat, fire

Ex Output:
heat


Ex Input:
fine, firstrate, ticket, money, handsome

Ex Output:
handsome


Ex Input:
warm, ethical, cool, persistent, level

Ex Output:

warm