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: moral characteristic 
Words: frank, stern, bun, concise, precise

Output: bun


Input: Consider Input: Category: nutritional value 
Words: heavy, fat, protein, obese, carbs

Output: obese


Input: Consider Input: Category: mode of transportation 
Words: flap, glide, fly, swim, drive


Output: swim