import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
class main {

static String formatDateForLastModifiedHeader() { return formatDateForLastModifiedHeader(now()); }
static String formatDateForLastModifiedHeader(long time) {
  var sdf = simpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", TimeZone.getTimeZone("GMT"));
  return sdf.format(time);
}
static long now_virtualTime;
static long now() {
  return now_virtualTime != 0 ? now_virtualTime : System.currentTimeMillis();
}



static java.text.SimpleDateFormat simpleDateFormat(String format, TimeZone timeZone) {
  java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(format);
  sdf.setTimeZone(timeZone);
  return sdf;
}



}