using System;

public class Program

{

​

    private string getSpacing(int times) {

        string spacing = "    ";    

        for(int i = 1; i< times ; i++) {

            spacing += spacing;

        }

        return spacing;

    }

    private static void printLevel(int spacing, int start, int end) {

        for(int i = start; i <= end ; i++) {

            spacing += getSpacing(spacing) + 

        }

        Console.WriteLine(spacing);

    }

    public static void Main()

    {

    }

}

​

​

​

​