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

public class net1{
	public static void main(String arg[]) throws IOException{
		ServerSocket ss=new ServerSocket(3001);
		while(true){
			Socket sc=ss.accept();
			PrintWriter valja=new PrintWriter(sc.getOutputStream(), true);
			valja.println("Hello NetWorld!");
			sc.close();
		}
	}
}