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: emotional display 
Words: buck, identity, culture, fawn, pester

Output: buck


Input: Consider Input: Category: corporate 
Words: unyielding, firm, streamline, llc, private


Output: unyielding