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: sugar, calories, iron, fat, area
Example Output: area

Example Input: Category: police punishment 
Words: jail, fine, bright, arrest, flyaway
Example Output: bright

Example Input: Category: emotional status 
Words: acceptable, comfortable, detailed, mad, fine
Example Output:
detailed