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: fine, custody, level, beautiful, attractive
Example Output: custody

Example Input: Category: consumer product 
Words: jealous, content, merchandise, jewelry, shop
Example Output: jealous

Example Input: Category: moral characteristic 
Words: fair, dishonest, impartial, warm, just
Example Output:
warm