code: public static void main(String[] args)
      {
          String target = args.length == 0 ? "HELLO WORLD" : convertArgs(args);
          String result = evolveString(target);
          System.out.println("Evolution result: " + result);
      }
docs: Entry point for the sample application.  Any data specified on the
  command line is considered to be the target String.  If no target is
  specified, a default of "HELLOW WORLD" is used instead.
  @param args The target String (as an array of words).