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:
provision, frank, hot dog, goodies, harsh

Ex Output:
harsh


Ex Input:
geese, crouch, duck, elephant, mallet

Ex Output:
crouch


Ex Input:
fat, absorption, ugly, pasty, iron

Ex Output:

iron