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: animal 
Words: goat, cat, fish, hamster, hunting
Example Output: hunting

Example Input: Category: employment activity 
Words: scold, water, fire, praise, replace
Example Output: water

Example Input: Category: shady activities 
Words: falsehood, banned, heavy, unlicensed, fudge
Example Output:
heavy