Bonzo, I think I'd have to see you do that. If you had to turn every card to the right of a face up card face up, how can there be two ace up cards separated by a face down cards? In other words, there would never be a sole face up card.

For the record, I avoid numbers whenever possible. I do language, and I do logic, but algebra is for other people.

What is a "zero turning into a zero"?