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: aesthetic characteristic 
Words: well, windy, even, fair, level
Example Output: windy

Example Input: Category: computers 
Words: text, hardware, file, reception, download
Example Output:
reception