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: bird 
Words: swift, tackle, pelican, crane, hoist
Example Output: hoist

Example Input: Category: emotional status 
Words: angry, joyful, tools, fearful, content
Example Output: tools

Example Input: Category: weather 
Words: windy, fair, endure, mild, just
Example Output:
just