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.

Example Input: Category: direction 
Words: south, loveful, down, left, falling
Example Output: loveful

Example Input: Category: moral characteristic 
Words: milky, fair, ok, loyal, unprejudiced
Example Output: milky

Example Input: Category: guitar part 
Words: fret, worried, chord, notes, headstock
Example Output:
worried