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: weather 
Words: fair, sunny, stormy, make the grade, variety
Example Output: variety

Example Input: Category: construction 
Words: tackle, crane, digger, sandpiper, dump truck
Example Output: sandpiper

Example Input: Category: moral characteristic 
Words: honorable, fair, loyal, balanced, mild
Example Output:
mild