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: comfortable, money, fine, prison, jail time
Example Output: comfortable

Example Input: Category: shady activities 
Words: unwarranted, mangle, cream, loosen, fudge
Example Output: cream

Example Input: Category: computers 
Words: answer calls, hardware, firewall, file, keys
Example Output:
answer calls