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: animal 
Words: fish, iguana, canyoning, hamster, horse
Example Output: canyoning

Example Input: Category: moral characteristic 
Words: light, unprejudiced, honorable, fair, unjust
Example Output: light

Example Input: Category: guitar part 
Words: neck, fret, jack, pick, angry
Example Output:
angry