Main {
(@
  static public void main(String args[]) throws Exception {
      BusRoute e = BusRoute.parse(System.in);
      e.show_tree();
      System.out.println();
      System.out.println(" DONE DISPLAY ");
      e.print_tree();
      System.out.println();
      System.out.println(" DONE PRINT ");
      System.out.println(" DONE ");
  }
@)
}

// class
BusRoute {

  void show_tree() to * (DisplayVisitor);
  // defines an adaptive method called show_tree by traversing
  // everywhere ( to *) using the DisplayVisitor
  // The DisplayVisitor is automatically generated from program.cd


  void print_tree() to * (PrintVisitor);
  // similar

}