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.

Input: Consider Input: Category: employment activity 
Words: ban, fire, empower, sack, ground

Output: ground


Input: Consider Input: Category: direction 
Words: down, backward, up, downward, shameful

Output: shameful


Input: Consider Input: Category: outdoor sport activity 
Words: hunting, bat, trap, fish, camp


Output: bat