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:
vittles, integrity, cheese, pork, frank

Ex Output:
integrity


Ex Input:
finger, heel, foot, ounce, elbow

Ex Output:
ounce


Ex Input:
attractive, ok, relaxed, fine, well

Ex Output:

attractive