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:
dump truck, hoist, crane, ostrich, goose

Ex Output:
dump truck


Ex Input:
melancholy, remorseful, up, down, emotional supports

Ex Output:

up