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

Example Input: Category: social gathering 
Words: club, group, meeting, grilled cheese, convention
Example Output: grilled cheese

Example Input: Category: accomodation 
Words: paved, paved, house, level, flat
Example Output:
paved