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: mode of transportation 
Words: bee, swim, fly, car, walk

Output: bee


Input: Consider Input: Category: animal 
Words: fish, waggle, fly, dangle, glide

Output: glide


Input: Consider Input: Category: physical property 
Words: large, obese, fat, chunky, fiber


Output: fiber