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.

Input: Consider Input: Category: social gathering 
Words: club, bar, dance hall, discothek, roll

Output: roll


Input: Consider Input: Category: aesthetic characteristic 
Words: luke, fair, variety, tone, well

Output: luke


Input: Consider Input: Category: emotional status 
Words: backward, emotional supports, down, shameful, kind


Output: backward