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:
content, sad, panicked, item, happy

Ex Output:
item


Ex Input:
hull, galley, deck, lifeline, tko

Ex Output:
tko


Ex Input:
ghostly, level, sunny, fair, milky

Ex Output:

sunny