using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Indent(0) + "List");

        Console.WriteLine(Indent(3) + "Item 1");

        Console.WriteLine(Indent(6) + "Item 1.1");

        Console.WriteLine(Indent(6) + "Item 1.2");

        Console.WriteLine(Indent(3) + "Item 2");

        Console.WriteLine(Indent(6) + "Item 2.1");

​

    }

    public static string Indent(int count)

    {

        return "".PadLeft(count);

    }

​

}