using System;

using System.Threading.Tasks;

public class Program

{

    public static void Main() 

    {

        Get();

        string arry = "4545454451906";

        var words = arry[^4..];

        Console.WriteLine(words); 

    }

    public static void Get() 

    {

        Task.Delay(5000);

        Console.WriteLine("Hello from Get();");

    }

}