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: geographical property 
Words: studio, hill, flat, even, horizontal

Output: studio


Input: Consider Input: Category: animal 
Words: fish, bat, sea turtle, trap, goat

Output: trap


Input: Consider Input: Category: emotional status 
Words: emotional, emotional supports, up, down, shameful


Output: up