import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
<BUG>import java.net.URL;
import java.util.concurrent.ExecutorService;</BUG>
import java.util.concurrent.Executors;
public class FriendlyServersTest
{

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URL;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class FriendlyServersTest
{
