// Utility function to read a line from standard input

  static String readEntry (String prompt)
  {
    try
    {
      StringBuffer buffer = new StringBuffer ();
      System.out.print (prompt);
      System.out.flush ();
      int c = System.in.read ();
      while (c != '\n' && c != -1)
      {
        buffer.append ((char)c);
        c = System.in.read ();
      }
      return buffer.toString ().trim ();
    }
    catch (IOException e)
    {
      return "";
    }
  }