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:
unflappalbe, refreshing, funny, cool, confident

Ex Output:
refreshing


Ex Input:
fly, train, car, bike, jump

Ex Output:

jump