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

Example Input: Category: aesthetic characteristic 
Words: fair, size, medium, dishonest, level
Example Output: dishonest

Example Input: Category: aesthetic characteristic 
Words: dull, bright, ok, detailed, fine
Example Output:
ok