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: aesthetic characteristic 
Words: cool, trustworthy, milky, fair, well
Example Output: trustworthy

Example Input: Category: weather 
Words: raining, sunny, fair, ghostly, windy
Example Output: ghostly

Example Input: Category: personal characteristic 
Words: level, confident, scorching, cool, unflappalbe
Example Output:
scorching