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: brownie, cake, fudge, banned, molasses
Example Output: banned

Example Input: Category: ocean 
Words: signal, timely, brine, flow, current
Example Output: timely

Example Input: Category: direction 
Words: sliding, down, forward, below, emotional upsets
Example Output:
emotional upsets