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:
close, nearest, touching, on top of, barred

Ex Output:
barred


Ex Input:
blunt, sausage, hot dog, frank, wienerwurst

Ex Output:
blunt


Ex Input:
beautiful, high quality, mad, handsome, fine

Ex Output:

mad