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: boxing terminology 
Words: ring, lifeline, deck, punch, corner

Ex Output:
lifeline


Ex Input:
Category: police punishment 
Words: probation, jail, arrest, fine, beautiful

Ex Output:
beautiful


Ex Input:
Category: shady activities 
Words: cupcake, replace, fudge, smuggled, mangle

Ex Output:

cupcake