import java.net.*;
import java.io.*;

public class TCPServer
{
  private static final int PORT = 3737;

  public static void  main(String[] args)
  {
    ServerSocket socket = null;

    try
      {
	socket = new ServerSocket(PORT);
      }
    catch (IOException e)
      {
	System.out.println("Fehler: kann ServerSocket nicht erzeugen: " + e);
	System.exit(1);
      }

    Socket client = null;
    try
      {
	client = socket.accept();
	System.out.println("Client: " + client.getLocalAddress() +
			   ":" + client.getLocalPort());

	DataInputStream dis = new DataInputStream(client.getInputStream());
	DataOutputStream dos = new DataOutputStream(client.getOutputStream());

	int counter = dis.readInt();

        for(int i = 0; i < counter; i++)
	  {
	    System.out.print(i + ": Empfange -> ");
	    String str = dis.readUTF(); 
	    System.out.print(str + ",  Sende -> ");
	    str += "+Server";
	    dos.writeUTF(str);
	    System.out.println(str);
	  }
      } 
    catch (IOException e) 
      {
	System.out.println("Fehler: Kommunikation mit Client gescheitert: " + e);
	System.exit(1);
      }   

    try
      {
	socket.close();
      }
    catch (IOException e)
      {
	System.out.println("Fehler: Schließen der Sockets gescheitert: " + e);
      }
  }
}