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import java.io.*;
import java.net.*;
public class EchoServer {
private int port=8888;
private ServerSocket serverSocket;
public EchoServer() throws IOException {
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package demo;
interface Runner{
 int ID=1;
 void run();
 void fly();
}
abstract class AI implements Runner{
 public void run(){
  System.out.println("I am running");
 }
 public void bb(int x,int y){
  System.out.println((x+y));
 }
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