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: computers 
Words: folder, document, file, image, correspondence
Example Output: correspondence

Example Input: Category: elements 
Words: ice, fire, burn, let go, combustion
Example Output: let go

Example Input: Category: police punishment 
Words: suspension, penalty, fine, alright, flyaway
Example Output:
alright