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: police punishment 
Words: probation, jail, arrest, fine, beautiful
Example Output: beautiful

Example Input: Category: activity 
Words: fritter, waste, pie, waste away, lollygag
Example Output: pie

Example Input: Category: chocolate food 
Words: tart, wrongful, cake, brownies, fudge
Example Output:
wrongful