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.

Input: Consider Input: Category: type of sandwich 
Words: club, roll, doorstep, discothek, toast

Output: discothek


Input: Consider Input: Category: consumer product 
Words: jealous, content, merchandise, jewelry, shop

Output: jealous


Input: Consider Input: Category: geographical property 
Words: plain, hill, mansion, flat, smooshed


Output: mansion