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:
cards, deck, suits, box, fold

Ex Output:
box


Ex Input:
sergeant, lieutenant, fighter, general, ordinary

Ex Output:
ordinary


Ex Input:
hearing, detached, comfortable, calm, fine

Ex Output:

hearing