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: comfortable, pretty, there, fine, classy
Example Output: comfortable

Example Input: Category: police punishment 
Words: flyaway, jail time, ok, arrest, fine
Example Output: ok

Example Input: Category: moral characteristic 
Words: dishonest, fair, unjust, alright, cold
Example Output:
cold