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: animal 
Words: bird, flutter, jump, waggle, fly

Output: flutter


Input: Consider Input: Category: police punishment 
Words: comfortable, money, fine, prison, jail time

Output: comfortable


Input: Consider Input: Category: social gathering 
Words: club, lettuce, picnic, cinema, dance hall


Output: lettuce