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: chocolate food 
Words: cake, cupcake, cream, smuggled, fudge
Example Output: smuggled

Example Input: Category: bird 
Words: concrete pourer, flamingo, egret, crane, duck
Example Output: concrete pourer

Example Input: Category: computers 
Words: file, keys, firewall, document, support
Example Output:
support