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:
stingray, fish, camp, swim, hunt

Ex Output:
stingray


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

Ex Output:
even


Ex Input:
jab, ring, check, level, deck

Ex Output:

check