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: physical activity 
Words: bend, duck, goose, jog, crouch

Output: goose


Input: Consider Input: Category: elements 
Words: ban, fire, combustion, ground, flame

Output: ban


Input: Consider Input: Category: animal 
Words: bird, fly, flutter, run, cockroach


Output: flutter