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: nutritional value 
Words: heavy, fat, protein, obese, carbs

Output: obese


Input: Consider Input: Category: emotional status 
Words: truss rod, emotional supports, emotional upsets, emotionalities, fret

Output: truss rod


Input: Consider Input: Category: boxing terminology 
Words: level, canvas, punch, deck, sail


Output: sail