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:
bow, fold, hull, deck, head

Ex Output:
fold


Ex Input:
falsification, fib, invent, fudge, cupcake

Ex Output:
cupcake


Ex Input:
mad, fine, bright, detached, comfortable

Ex Output:

bright