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:
ok, wispy, jail, prime, fine

Ex Output:
ok


Ex Input:
ubiquitous, captain, typical, general, boring

Ex Output:
captain


Ex Input:
studio, round, mansion, flat, paved

Ex Output:

paved