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:
fret, emotional supports, output cord, angry, concerned

Ex Output:
output cord


Ex Input:
ostrich, hoist, egret, crane, parrot

Ex Output:
hoist


Ex Input:
down, emotional upsets, melancholy, ashamed, ground

Ex Output:

ground