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

public class Ping {
  public static void main(String[] args) throws Exception {
    while(true) {
      InetAddress address = InetAddress.getByName(args[0]);
      long nanos = System.nanoTime();
      if(address.isReachable(50000)) {
        nanos = System.nanoTime() - nanos;
        long millis = Math.max(0, Math.round(nanos / Math.pow(10, 6)) - 1000);
        System.out.println("Reply from " + address.getHostAddress() + ": time=" + millis + "ms");
        Thread.sleep(Math.max(0, 1000 - millis));
      } else {
        System.out.println("Is not reachable");
        break;
      }
    }
  }
}