using System;

public class CheckCard

{

    public static void Main()

    {

        string card = Console.ReadLine();

        if (card.Equals("2") || card.Equals("3") || card.Equals("4") || card.Equals("5") || card.Equals("6") || card.Equals("7") || card.Equals("8") 

            || card.Equals("9") || card.Equals("10")|| card.Equals("A") || card.Equals("J") || card.Equals("Q") || card.Equals("K")) 

        {

            Console.WriteLine("yes");

        }

        else

        {

            Console.WriteLine("no");

        }

    }

}