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:
smooshed, horizontal, condominium, flat, valley

Ex Output:
condominium


Ex Input:
fly, car, spider, dangle, jump

Ex Output:

car