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: chocolate food 
Words: fudge, cream, replace, cookies, brownies
Example Output: replace

Example Input: Category: kitchenware 
Words: metal, glass, knifer, dish, cup
Example Output: metal

Example Input: Category: direction 
Words: down, descending, lower, shameful, falling
Example Output:
shameful