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:
size, unjust, tone, fair, medium

Ex Output:
unjust


Ex Input:
ok, mad, fine, bright, annoyed

Ex Output:
bright


Ex Input:
lifeline, stern, fold, deck, rudder

Ex Output:

fold