import java.io.*;
import java.net.*;
class UDPClient {
    public static void main(String args[]) throws Exception
    {
        BufferedReader inFromUser =
            new BufferedReader(new InputStreamReader
                (System.in));
        DatagramSocket clientSocket = new DatagramSocket();
        InetAddress IPAddress = 
            InetAddress.getByName("localhost");
        byte[] receiveData = new byte[1024];
        String sentence = inFromUser.readLine();
        byte[] sendData = sentence.getBytes();
        DatagramPacket sendPacket =
            new DatagramPacket(sendData, sendData.length, 
                               IPAddress, 9876);
        clientSocket.send(sendPacket);
        DatagramPacket receivePacket =
            new DatagramPacket(receiveData,
                               receiveData.length);
        clientSocket.setSoTimeout(10);
        clientSocket.receive(receivePacket);
        // we still need to catch the exception and retry
        String modifiedSentence =
            new String(receivePacket.getData(),
                       0,
                       receivePacket.getLength());
        System.out.println("FROM SERVER:" +
                           modifiedSentence);
        clientSocket.close();
    }
}