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:
jail, probation, fine, classy, firstrate

Ex Output:
classy


Ex Input:
fat, ugly, sugar, salt, protein

Ex Output:
ugly


Ex Input:
culture, fawn, kid, calf, woods

Ex Output:

culture