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: activity 
Words: divide, fritter, dessert, whittle, spend

Ex Output:
dessert


Ex Input:
Category: guitar part 
Words: truss rod, fret, neck, bored, strap lock

Ex Output:
bored


Ex Input:
Category: moral characteristic 
Words: fair, unprejudiced, loyal, fine, light

Ex Output:

light