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: train, fly, jump, leap, grasshopper

Output: train


Input: Consider Input: Category: body part 
Words: heel, shin, pound, finger, foot

Output: pound


Input: Consider Input: Category: type of sandwich 
Words: club, open-faced, bacon, french toast, dance hall


Output: dance hall