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:
blocking, corner, deck, fight, hearts

Ex Output:
hearts


Ex Input:
recruit, replace, sack, heat, fire

Ex Output:
heat


Ex Input:
jog, crouch, bow, duck, pig

Ex Output:

pig