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("hostname", 6789);
  DataOutputStream outToServer = new DataOutputStream(
     clientSocket.getOutputStream());
  BufferedReader inFromServer = new BufferedReader(new InputStreamReader(
     clientSocket.getInputStream()));
  sentence = inFromUser.readLine();
  outToServer.writeBytes(sentence + '\n');
  modifiedSentence = inFromServer.readLine();
  System.out.println("FROM SERVER: " + 
          modifiedSentence);
  clientSocket.close();
 }
}