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

public class Client {
    public static void main(String args[]) {

	Socket s = null;
	int serversocket = 4567;
	try {

	    // host = 127.0.0.1
	    s = new Socket("127.0.0.1", serversocket);

	    DataInputStream in = new DataInputStream(s.getInputStream());
	    DataOutputStream out = new DataOutputStream(s.getOutputStream());

	    String texto = "";
	    InputStreamReader input = new InputStreamReader(System.in);
	    BufferedReader reader = new BufferedReader(input);



	    while (true) {
			try {
			    texto = reader.readLine();
			} catch (Exception e) {
		}

		out.writeUTF(texto);

		String data = in.readUTF();

		System.out.println(data);
	    }

	} catch (UnknownHostException e) {
	    System.out.println("Sock:" + e.getMessage());
	} catch (EOFException e) {
	    System.out.println("EOF:" + e.getMessage());
	} catch (IOException e) {
	    System.out.println("IO:" + e.getMessage());
	} finally {
	    if (s != null)
		try {
		    s.close();
		} catch (IOException e) {
		    System.out.println("close:" + e.getMessage());
		}
	}
    }
}


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

public class Server{
    public static void main(String args[]){
        int number=0;
        try{
            int serverPort = 4567;
            ServerSocket listenSocket = new ServerSocket(serverPort);
            while(true) {
                Socket clientSocket = listenSocket.accept();
                new Connection(clientSocket,number);
                number++;
            }
        }catch(IOException e)
        {System.out.println("Listen:" + e.getMessage());}
    }
}

class Connection extends Thread {
    DataInputStream in;
    DataOutputStream out;
    Socket clientSocket;
    int number;

    public Connection (Socket aClientSocket,int clientNumber) {

        try{
            number=clientNumber;
            clientSocket = aClientSocket;
            in = new DataInputStream(clientSocket.getInputStream());
            out = new DataOutputStream(clientSocket.getOutputStream());
            this.start();
        }catch(IOException e){System.out.println("Connection:" + e.getMessage());}
    }

    public void run(){
        try{
            while(true){

                String data = in.readUTF();
                out.writeUTF("["+number+"]"+" "+data);
            }
        }catch(EOFException e){System.out.println("=["+number+"]=");
        }catch(IOException e){System.out.println("IO:" + e);}
    }
}