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: aesthetic characteristic 
Words: medium, just, light, ghostly, fair

Output: just


Input: Consider Input: Category: shady activities 
Words: falsification, wrongful, rich, fudge, unlicensed

Output: rich


Input: Consider Input: Category: mode of transportation 
Words: swim, pounce, train, car, fly


Output: pounce