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:
ok, wispy, jail, prime, fine

Ex Output:
ok


Ex Input:
lead, glass, spoon, fiberglass, spyhole

Ex Output:
spoon


Ex Input:
beetle, fly, flutter, glide, soar

Ex Output:

beetle