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:
stormy, fair, just, mild, brisk

Ex Output:
just


Ex Input:
fret, notes, emotional state, bored, emotional upsets

Ex Output:
notes


Ex Input:
fine, money, arrest, alert, penalty

Ex Output:

alert