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, protein, fat, sugars, area

Output: area


Input: Consider Input: Category: employment activity 
Words: pay, instruct, heat, fire, scold

Output: heat


Input: Consider Input: Category: window material 
Words: translucent fabric, fiberglass, panel, knife, glass


Output: knife