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: poker 
Words: board, joker, deck, fold, apron

Output: apron


Input: Consider Input: Category: corporate 
Words: solid, sustainability, streamline, firm, private

Output: solid


Input: Consider Input: Category: mode of transportation 
Words: glide, car, bats, soar, fly


Output: bats