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: emotional status 
Words: alright, alert, fine, detached, level
Example Output: level

Example Input: Category: body part 
Words: elbow, foot, knee, inch, hand
Example Output: inch

Example Input: Category: aesthetic characteristic 
Words: detailed, fine, handsome, happy, hot
Example Output:
happy