CheckForAPlayCard

using System;
//Classical play cards use the following signs to designate the card face:
//2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K and A. 
//Write a program that enters a string and prints “yes” 
//if it is a valid card sign or “no” otherwise. Examples:
//character	 Valid card sign?
//  5	        yes
//  1         	no
//  Q	        yes
//  q         	no
//  P	        no
//  10	        yes

class CheckForPlayCard
{
    static void Main()
    {
        string cardSign = Console.ReadLine();
        switch (cardSign)
        {
            case "2":
            case "3":
            case "4":
            case "5":
            case "6":
            case "7":
            case "8":
            case "9":
            case "10":
            case "A":
            case "J":
            case "K":
            case "Q":
                Console.WriteLine("yes");
                break;

            default:
                Console.WriteLine("no");
                break;
        }
        
    }
}