using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        var barra = "65590.00002 00485.500003 24907.049001 1 83700000001211"; 

        barra = Regex.Replace(barra, @"[\s.]+", "");

        barra = barra.Substring(0, 4) + barra.Substring(32, 15) + barra.Substring(4, 5) + barra.Substring(10, 10) + barra.Substring(21, 10);

        Console.WriteLine(barra);

    }

}