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.

Input: Consider Input: Category: aesthetic characteristic 
Words: fine, custody, level, beautiful, attractive

Output: custody


Input: Consider Input: Category: animal 
Words: hamster, fish, tiger, canyoning, sea turtle

Output: canyoning


Input: Consider Input: Category: physical property 
Words: heavy, salt, chunky, fat, large


Output: salt