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: poker 
Words: chips, punch, deck, draw, queen
Example Output: punch

Example Input: Category: shady activities 
Words: falsehood, banned, heavy, unlicensed, fudge
Example Output: heavy

Example Input: Category: chocolate food 
Words: invent, fudge, brownie, cookies, tart
Example Output:
invent