On Feb 21, 2007, at 4:50 AM, rretzbach / googlemail.com wrote:

>   So far the only perfect "algo" that came to my mind was to create
> all possible books and chose one randomly.

You can create a lot less than "all possible books" if you think in  
terms of patterns, and still be able to create all of the  
combinations.  Think about what moves around in the tickets/books  
besides the numbers.

James Edward Gray II