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:
corner, deck, fight, knockout, blind

Ex Output:
blind


Ex Input:
bus, fly, swim, spider, flap

Ex Output:
spider


Ex Input:
fire, blaze, scold, empower, ban

Ex Output:

blaze