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:
precise, integrity, frank, cheese, brash

Ex Output:
cheese


Ex Input:
specialty, content, angry, program, activity

Ex Output:
angry


Ex Input:
happy, disappointed, content, activity, ecstatic

Ex Output:

activity