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:
chips, punch, deck, draw, queen

Ex Output:
punch


Ex Input:
ok, wispy, jail, prime, fine

Ex Output:
ok


Ex Input:
trap, hamster, bat, cow, fish

Ex Output:

trap