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:
color, medium, fair, warm, size

Ex Output:
warm


Ex Input:
fine, content, acceptable, well, handsome

Ex Output:
handsome


Ex Input:
stern, deck, pack, head, dock

Ex Output:

pack