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:
fine, prime, arrest, hot, jail time

Ex Output:
hot


Ex Input:
club, hero, lettuce, bar, toast

Ex Output:
bar


Ex Input:
ant, fly, jump, eagle, bus

Ex Output:

bus