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:
club, open-faced, bacon, french toast, dance hall

Ex Output:
dance hall


Ex Input:
color, medium, fair, warm, size

Ex Output:
warm


Ex Input:
level, tone, fair, impartial, milky

Ex Output:

impartial