I don't know what I didn't do. I tried everything possible. There is no pattern here. I even targeted the last eight characters at the end of WIF for seven whole months trying to reconstruct the private key. Whichever option you choose and you don't know the public key, this is unsolvable. Or it can be solved in a couple of thousand years. The numbers in question are the size of the entire universe. Quantum computing is needed to solve this. And a very good one at that.