// Server
import java.io.*;
import java.net.*;

public class Server {
    public static void main(String[] args) throws IOException {

        ServerSocket ss = new ServerSocket(1201);
        Socket s = ss.accept();

        DataInputStream din = new DataInputStream(s.getInputStream());
        DataOutputStream dout = new DataOutputStream(s.getOutputStream());

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String msgin="", msgout = "";

        while(!msgin.equals("end")) {
            msgin = din.readUTF();
            System.out.println(msgin);
            msgout = br.readLine();
            dout.writeUTF(msgout);
            dout.flush();
        }
        s.close();
    }
}


// Client
import java.io.*;
import java.net.*;

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

        Socket s = new Socket("127.0.0.1",1201);
        DataInputStream din = new DataInputStream(s.getInputStream());
        DataOutputStream dout = new DataOutputStream(s.getOutputStream());

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String msgin="", msgout="";
        while(!msgin.equals("end")){
            msgout = br.readLine();
            dout.writeUTF(msgout);
            msgin = din.readUTF();
            System.out.println(msgin);
        }

    }
}