Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Example Input: Category: social gathering 
Words: picnic, french toast, clan, club, bar
Example Output: french toast

Example Input: Category: emotional status 
Words: down, remorseful, up, emotional supports, shameful
Example Output: up

Example Input: Category: police punishment 
Words: exquisite, probation, firstrate, fine, money
Example Output:
exquisite