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: nutritional value 
Words: heavy, fat, protein, obese, carbs
Example Output: obese

Example Input: Category: widespread 
Words: regular, colonel, typical, ordinary, general
Example Output: colonel

Example Input: Category: moral characteristic 
Words: mild, equitable, unprejudiced, trustworthy, fair
Example Output:
mild