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: aesthetic characteristic 
Words: there, ticket, fine, dull, level
Example Output: ticket

Example Input: Category: police punishment 
Words: wispy, fine, probation, calm, prime
Example Output: calm

Example Input: Category: emotional status 
Words: ecstatic, content, disappointed, sad, service
Example Output:
service