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: boxing terminology 
Words: deck, ring, head, knockout, glove

Output: head


Input: Consider Input: Category: outdoor sport activity 
Words: hike, cow, trap, row, fish

Output: cow


Input: Consider Input: Category: police punishment 
Words: firstrate, penalty, detailed, fine, flyaway


Output: detailed