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:
unlicensed, chocolate, heavy, fudge, chocolate cake

Ex Output:
unlicensed


Ex Input:
clime, level, cool, tone, fair

Ex Output:
clime


Ex Input:
board, emotional state, string, fret, neck

Ex Output:

emotional state