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:
hiking, stingray, shark, fish, tiger

Ex Output:
hiking


Ex Input:
nervous, bored, emotional supports, chord, fret

Ex Output:
chord


Ex Input:
meat, weenie, loyalty, frank, vittles

Ex Output:

loyalty