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: hamster, mice, fish, tiger, row

Output: row


Input: Consider Input: Category: employment activity 
Words: pay, instruct, heat, fire, scold

Output: heat


Input: Consider Input: Category: type of sandwich 
Words: club, toast, grilled cheese, hero, picnic


Output: picnic