import java.io.PrintWriter;

public class Expt
{
  public static void main(String[] args)
  {
    PrintWriter pen = new PrintWriter(System.out, true);

    Sub marine = new Sub();
    Super sonic = (Super) marine;
    pen.println(sonic.toString());
    pen.println(((Super) marine).toString());
    pen.close();
  } // main(String[])
} // class Expt