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.

Example Input: Category: boxing terminology 
Words: pack, level, deck, corner, jab
Example Output: pack

Example Input: Category: chocolate food 
Words: brownie, loosen, chocolate cake, fudge, molasses
Example Output: loosen

Example Input: Category: boxing terminology 
Words: glove, ring, deck, box, bow
Example Output:
bow