using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        One();

    }

    public static void One(){

        Two();

    }

    public static void Two(){

        Three();

    }

    public static void Three(){

        Four();

    }

    public static void Four(){

        Console.WriteLine("Hello World!");

        var stackTrace = new System.Diagnostics.StackTrace();

        List<string> methods = new List<string>();

        for (int i = stackTrace.FrameCount - 1; i >= 0; i--)

        {

            methods.Add(stackTrace.GetFrame(i).GetMethod().Name);

        }

        Console.WriteLine(string.Join("->", methods));

    }

}