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: emotional status 
Words: down, emotional upsets, disgusted, shameful, sliding
Example Output: sliding

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

Example Input: Category: boxing terminology 
Words: deck, jab, punch, head, glove
Example Output:
head