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: type of rigidity 
Words: unbending, unyielding, inflexible, firm, streamline

Output: streamline


Input: Consider Input: Category: police punishment 
Words: suspension, arrest, classy, custody, fine

Output: classy


Input: Consider Input: Category: direction 
Words: downward, descending, lower, ashamed, down


Output: ashamed