using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Arbiwijaya Kwek-1831121");

        Console.WriteLine("Masukan Nomor Id Anda");

        string Nomor;

        int ID,loop;

        loop=0;

        while(loop<=20)

        {

            Nomor = Console.ReadLine();

            ID=Convert.ToInt32(Nomor);

            if (ID == 1831136)

            {

                Console.WriteLine("Hi Ericson");

            }

            else if (ID == 1831121)

            {

                Console.WriteLine("Hi Arbiwijaya Kwek");

            }

            else if (ID == 1831199)

            {

                Console.WriteLine("Hi Budi Sutono");

            }

            else if (ID == 1831102)

            {

                Console.WriteLine("Hi Cristina");

            }

            else if (ID == 1831020)

            {

                Console.WriteLine("Hi Wina");

            }

            else

            {

                Console.WriteLine("ID tidak ditemukan, silahkan coba lagi");

            }

        }

    }

}