using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(int.TryParse("123",         out int a));

        Console.WriteLine(int.TryParse("0",           out int s));

        Console.WriteLine(int.TryParse("null",        out int d));

        Console.WriteLine(int.TryParse((ReadOnlySpan<byte>)null, out int f));

        Console.WriteLine(int.TryParse((string?)null, out int g));

        string asdf = "asdfghjkl";

        Console.WriteLine(asdf[..^6]);

    }

}