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: emotional status 
Words: down, emotional state, loveful, ashamed, flat

Output: flat


Input: Consider Input: Category: physical property 
Words: fat, vitamin c, area, brittleness, absorption

Output: vitamin c


Input: Consider Input: Category: guitar part 
Words: jack, notes, angry, fret, headstock


Output: angry