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:
goodies, weenie, blunt, wiener, frank

Ex Output:
blunt


Ex Input:
blue, wave, current, timely, drink

Ex Output:
timely


Ex Input:
spyhole, fiberglass, glass, knifer, metal

Ex Output:

knifer