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, chocolate cake, pudding, unwarranted, heavy
Example Output: unwarranted

Example Input: Category: outdoor sport activity 
Words: kayak, raft, fish, canyoning, dolphin
Example Output: dolphin

Example Input: Category: social gathering 
Words: dance hall, club, team, french toast, cinema
Example Output:
french toast