using System;

public class Program

{

    public static void Main()

    {

int[] mas = new int[20];

for (int i = 2; i < mas.Length; i++)

{mas[i] = i;

{if (mas[i]%2 ==0) 

 Console.Write(mas[i] + " ");

 Console.WriteLine(mas[i] + " ");

} 

}

    }}

​

​