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:
fair, even, milky, ghostly, luke

Ex Output:
luke


Ex Input:
level, knockout, deck, fight, gunwale

Ex Output:
gunwale


Ex Input:
spider, car, fly, beetle, pounce

Ex Output:

car