If you understand that... I will tell you an answer. Let me know.
I told you, there's no tricks. It's just a mental exercise. I told you it's hard. But my teenage daughter figured it out in about 3 days. It took me a week. I've given you every single clue you can possibly have, without giving the solution.
I guess you'll never know, unless the genius I love comes along. He'll figure this out in a minute.