import java.io.*;
import java.net.*;
class TCPClient {
 public static void main(String argv[]) throws Exception
 {
  String sentence;
  String modifiedSentence;

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

  Socket clientSocket = new Socket("localhost", 6789);

  DataOutputStream outToServer =
   new DataOutputStream(
     clientSocket.getOutputStream());

  BufferedReader inFromServer =
   new BufferedReader(new InputStreamReader(
     clientSocket.getInputStream()));

  sentence = inFromUser.readLine();

  while (sentence != null) {
     outToServer.writeBytes(sentence + '\n');

     modifiedSentence = inFromServer.readLine();

     System.out.println("FROM SERVER: " + 
          modifiedSentence);

     sentence = inFromUser.readLine();
  }

  clientSocket.close();
 }
}