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:
early, water, delayed, history, current

Ex Output:
water


Ex Input:
level, corner, chips, deck, caution

Ex Output:
chips


Ex Input:
protein, capacitance, heavy, fat, chunky

Ex Output:

protein