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: kitchenware 
Words: metal, glass, knifer, dish, cup

Output: metal


Input: Consider Input: Category: corporate 
Words: unyielding, concerted, firm, combined, united

Output: unyielding


Input: Consider Input: Category: animal 
Words: walk, run, bats, eagle, fly


Output: walk