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: luke, fair, variety, tone, well
Example Output: luke

Example Input: Category: emotional status 
Words: nervous, frustrated, fret, jack, concerned
Example Output: jack

Example Input: Category: accomodation 
Words: cabin, elevation, townhome, even, flat
Example Output:
elevation