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: computers 
Words: download, file, order office supplies, document, motherboard
Example Output: order office supplies

Example Input: Category: social gathering 
Words: grilled cheese, place, club, dance hall, meeting
Example Output: grilled cheese

Example Input: Category: outdoor sport activity 
Words: hunting, fish, kayak, goat, raft
Example Output:
goat