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

public class EchoClient {
  public static void main(String[] args) throws IOException {
    
    if (args.length != 2) {
      System.err.println(
        "Usage: java EchoClient <host name> <port number>");
      System.exit(1);
    }

    String hostName = args[0];
    int portNumber = Integer.parseInt(args[1]);

    try (
      Socket echoSocket = new Socket(hostName, portNumber);
      PrintWriter out = new PrintWriter(echoSocket.getOutputStream(), true);
      BufferedReader in = new BufferedReader( new InputStreamReader(echoSocket.getInputStream() ));
      BufferedReader stdIn = new BufferedReader( new InputStreamReader(System.in));
    ) {
      String userInput;
      while ((userInput = stdIn.readLine()) != null) {
        out.println(userInput);
        System.out.println("echoed : "+in.readLine());
      }
    } catch (UnknownHostException e) {
      System.err.println("Don't know about host " + hostName);
      System.exit(1);
    } catch (IOException e) {
      System.err.println("Couldn't get I/O for the connection to " +
        hostName);
      System.exit(1);
    } 
  }
}