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: physical activity 
Words: bend, jog, get down, duck, pig
Example Output: pig

Example Input: Category: moral characteristic 
Words: clime, fine, fair, trustworthy, unjust
Example Output: clime

Example Input: Category: moral characteristic 
Words: just, fair, well, dishonest, stormy
Example Output:
stormy