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: construction 
Words: hoist, tackle, digger, excavator, crane
Example Output: tackle

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

Example Input: Category: emotional status 
Words: decent, fine, jail, acceptable, calm
Example Output:
jail