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:
melancholy, descending, emotionalities, emotional, down

Ex Output:
descending


Ex Input:
provision, frank, hot dog, goodies, harsh

Ex Output:
harsh


Ex Input:
fair, endure, tone, raining, warm

Ex Output:

tone