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:
crew, ring, deck, blocking, punch

Ex Output:
crew


Ex Input:
sunny, decent, fair, impartial, honorable

Ex Output:

sunny