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: personal characteristic 
Words: cool, calm, warm, persistent, level

Output: warm


Input: Consider Input: Category: boxing terminology 
Words: fight, caution, level, cards, deck


Output: cards


