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

public class Server{
    public static void main(String[] args)throws Exception {
    try{
        Scanner in = new Scanner(System.in);

        ServerSocket serverSocket = new ServerSocket(5000);
        Socket socket = serverSocket.accept();
        DataInputStream din = new DataInputStream(socket.getInputStream());
        DataOutputStream dout = new DataOutputStream(socket.getOutputStream());

        String readingLine = in.nextLine();

        while(readingLine != "umbrella") {
            dout.writeUTF(readingLine); //to output from the socket

            String str = (String) din.readUTF(); //to read from the socket
            System.out.println("client : " + str);
            
            System.out.println("Enter Your Input : ");
            readingLine = in.nextLine();
        }

        // dout.writeUTF("Hello World from Server!");
        // String str = (String) din.readUTF();
        socket.close();
        serverSocket.close();
    }
        catch(Exception e){
            System.out.println(e);
        }
    }

}