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: suspension, arrest, classy, custody, fine

Output: classy


Input: Consider Input: Category: location (proximity) 
Words: on top of, touching, finished for the day, close, right there

Output: finished for the day


Input: Consider Input: Category: corporate 
Words: synergy, amalgamated, united, firm, unyielding


Output: unyielding