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: ocean 
Words: late, wave, blue, current, drink
Example Output: late

Example Input: Category: guitar part 
Words: fret, notes, emotional upsets, output cord, truss rod
Example Output: emotional upsets

Example Input: Category: emotional status 
Words: truss rod, emotional supports, emotional upsets, emotionalities, fret
Example Output:
truss rod