CheckPlayCard

class CheckPlayCard
{
    static void Main(string[] args)
    {
        string[] cards = new string[] { "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A" };
        string input = Console.ReadLine();
        Console.WriteLine(cards.Contains(input) ? "yes" : "no");
    }
}