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

// This talk server only accepts one line at a time, unlike
// the regular UNIX talk server which accepts one char at 
// a time.
class TalkServer
{
    public static void main(String[] args) throws IOException
    {
	int talkPort = 12000;
	try 
	{
	    ServerSocket s = new ServerSocket(talkPort);
	    Socket incoming = s.accept();
	    BufferedReader in = new BufferedReader
		(new InputStreamReader
		 (new DataInputStream(incoming.getInputStream())));

	    PrintStream out
		= new PrintStream(incoming.getOutputStream());

	    BufferedReader inKey = new BufferedReader
		(new InputStreamReader
		 (new DataInputStream(System.in)));

	    boolean done = false;
	    while (!done)
	    {
		String str = in.readLine();
		if (str == null)
		    done = true;
		else
		{
		    System.out.println(str);
		    str = inKey.readLine();
		    out.println(str);
		}
	    }
	    incoming.close();
	}
	catch (Exception e)
	{
	    System.out.println(e);
	}
    }
}