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: walk, flap, fish, fly, bats

Output: flap


Input: Consider Input: Category: police punishment 
Words: prison, fine, calm, money, suspension

Output: calm


Input: Consider Input: Category: widespread 
Words: soldier, general, standard, normal, boring


Output: soldier