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.

Ex Input:
Category: guitar part 
Words: neck, strap lock, fret, angry, notes

Ex Output:
angry


Ex Input:
Category: aesthetic characteristic 
Words: fair, medium, size, light, loyal

Ex Output:
loyal


Ex Input:
Category: type of sandwich 
Words: picnic, french toast, submarine, open-faced, club

Ex Output:

picnic