using System;

public class Program

{

    public static void Main()

    {

        int num; 

        int n = 2;

        num = 1; 

            while (n<=20)

            { 

                Console.WriteLine("2 x  = " + num + " = " + n );

                num = num+1; 

                n= n+2; 

            }

    }

}