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: geographical property 
Words: studio, hill, flat, even, horizontal

Ex Output:
studio


Ex Input:
Category: season 
Words: winter, roll, spring, hiems, fall

Ex Output:
roll


Ex Input:
Category: boxing terminology 
Words: level, dock, glove, canvas, deck

Ex Output:

dock