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:
cow, fish, dog, sea turtle, hunt

Ex Output:
hunt


Ex Input:
deck, sail, crew, head, fold

Ex Output:
fold


Ex Input:
70, pale, fair, light, milky

Ex Output:

70