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: convention, club, discothek, hamburger, dance hall

Output: hamburger


Input: Consider Input: Category: baby animals 
Words: cub, identity, buck, fawn, kid

Output: identity


Input: Consider Input: Category: aesthetic characteristic 
Words: milky, fair, color, make the grade, medium


Output: make the grade