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:
luke, milky, stormy, fair, warm

Ex Output:
milky


Ex Input:
ice, let go, fire, sack, replace

Ex Output:
ice


Ex Input:
bow, call, deck, bridge, sail

Ex Output:

call