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: sweet roll, seperate, fritter, dunker, dumpling
Example Output: seperate

Example Input: Category: boxing terminology 
Words: apron, punch, deck, canvas, call
Example Output: call

Example Input: Category: police punishment 
Words: suspension, arrest, classy, custody, fine
Example Output:
classy