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: fried food 
Words: croquet, dumpling, fritter, spend, patty
Example Output: spend

Example Input: Category: elements 
Words: pay, cool, combustion, air, fire
Example Output: pay

Example Input: Category: police punishment 
Words: jail time, annoyed, penalty, fine, firstrate
Example Output:
annoyed