[9500]

But by ensuring that A, W1 and W2 wallets are yours, you are able to try as many times as you want (provided you're willing to pay for the fees). And the more times you try, more your probability of success approaches 1.

[gomox]

Yes, but that's hardly practical. I guess someone will make software for this (with the corresponding caveats, bugs, security and trust issues, etc).