using System;

public class Program

{

    public static void Main()

    {

         Console.WriteLine("enter number1");

            int num1 = Convert.ToInt32(Console.ReadLine());

​

            Console.WriteLine("enter number2");

            int num2 = Convert.ToInt32(Console.ReadLine());

​

            if (num1 % 3 == 0 && num2 % 3 == 0)

            {

                Console.WriteLine("yes");

            }

            else if (num1 % 7 == 0 && num2 % 7 == 0)

            {

                Console.WriteLine("yes");

            }

            else

            {

                Console.WriteLine("no");

            }

    }

}