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: construction 
Words: hoist, crane, excavator, egret, derrick

Output: egret


Input: Consider Input: Category: police punishment 
Words: prison, firstrate, beautiful, money, fine


Output: beautiful