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: police punishment 
Words: ticket, comfortable, prime, custody, fine
Example Output: comfortable

Example Input: Category: accomodation 
Words: mansion, elevation, flat, duplex, even
Example Output:
elevation