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: moral characteristic 
Words: concise, frank, matter of fact, pork, blunt

Ex Output:
pork


Ex Input:
Category: type of rigidity 
Words: unbending, unyielding, inflexible, firm, streamline

Ex Output:
streamline


Ex Input:
Category: boxing terminology 
Words: ring, blocking, box, deck, rudder

Ex Output:

rudder