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: sugar, calories, iron, fat, area

Output: area


Input: Consider Input: Category: physical property 
Words: obese, fat, vitamin c, heavy, thin

Output: vitamin c


Input: Consider Input: Category: secretary duty 
Words: prepare, ram, answer calls, organize, file


Output: ram