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, blaze, water, flame, recruit

Ex Output:
recruit


Ex Input:
fine, even, unjust, impartial, fair

Ex Output:
even


Ex Input:
recruit, empower, fire, retire, blaze

Ex Output:

blaze