using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        G1();

        await F1();

        await F2();

        try

        {

            await H1();

        }

        catch(Exception e)

        {

            Console.WriteLine(e);

        }

        await J1();

    }

    static async Task F1()

    {

        await F3();

    }

    static async Task F2()

    {

        await F3();

    }

    static async Task F3()

    {

        await Task.Yield();

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

        Console.WriteLine(stackTrace.ToString());

    }

    static void G1()

    {

        G2();

    }

    static void G2()

    {

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

        Console.WriteLine(stackTrace.ToString());

    }

    static async Task H1()

    {

        await H2();

    }

    static async Task H2()

    {

        await Task.Yield();

        throw new Exception("oh no H2");

    }

    static async Task J1()

    {

        await J2();

    }

    static async Task J2()

    {

        await Task.Yield();

        throw new Exception("oh no J2");

    }

}