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: military rank 
Words: general, fighter, normal, major, lieutenant

Ex Output:
normal


Ex Input:
Category: animal 
Words: pounce, fly, swim, walk, walk

Ex Output:
walk


Ex Input:
Category: aesthetic characteristic 
Words: handsome, penalty, attractive, beautiful, fine

Ex Output:

penalty