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: moral characteristic 
Words: even, equitable, unprejudiced, fair, impartial
Example Output: even

Example Input: Category: aesthetic characteristic 
Words: high quality, ok, level, classy, fine
Example Output: ok

Example Input: Category: moral characteristic 
Words: unjust, cool, loyal, dishonest, fair
Example Output:
cool