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: concerned, board, nervous, emotional, fret

Output: board


Input: Consider Input: Category: physical activity 
Words: bend, jog, get down, duck, pig

Output: pig


Input: Consider Input: Category: guitar part 
Words: amp, notes, headstock, fret, worried


Output: worried