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: police punishment 
Words: classy, probation, custody, fine, flyaway

Output: classy


Input: Consider Input: Category: weather 
Words: raining, sunny, fair, ghostly, windy

Output: ghostly


Input: Consider Input: Category: corporate 
Words: firm, sustainability, corporation, private, tough


Output: tough