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.

Category: moral characteristic 
Words: concise, brash, integrity, cheese, frank
cheese

Category: guitar part 
Words: fret, concerned, jack, notes, amp
concerned

Category: direction 
Words: backward, down, below, ground, emotional

emotional