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: aesthetic characteristic 
Words: pretty, probation, neat, fine, level
Example Output: probation

Example Input: Category: shady activities 
Words: banned, replace, smear, chocolate cake, fudge
Example Output: chocolate cake

Example Input: Category: weather 
Words: level, fair, raining, deal, stormy
Example Output:
level