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: group, clan, team, club, doorstep

Output: doorstep


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

Output: well


Input: Consider Input: Category: emotional display 
Words: kitten, paw, fawn, cajole, lust


Output: kitten