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:
emotional upsets, emotional supports, down, ashamed, up

Ex Output:
up


Ex Input:
pay, praise, fire, inferno, let go

Ex Output:
inferno


Ex Input:
unyielding, llc, united, firm, common

Ex Output:

unyielding