using System;
using System.Text;
namespace BaiTrenLopNgay23vs2
{
class Program
static void Main(string[] args)
Console.OutputEncoding = Encoding.UTF8;
string H = "https://www.hutech.edu.vn/khoacntt";
string[] arr = H.Split('.');
Console.WriteLine("{0}", arr[1]);
string[] a = H.Split('/');
Console.WriteLine("{0}", a[3]);
int vt = H.LastIndexOf("/");
string Khoa = H.Substring(vt +1);
Console.WriteLine(Khoa);
int vt2 = H.IndexOf("hutech");
string Ht = H.Substring(vt2,6);
Console.WriteLine(Ht);
Console.ReadLine();
}