I did another test of the algorithm with my private key and got no feedback ...

But I understood the algorithm and I managed to reproduce a certain result, I used a random private key of 51 characters, the algorithm only shows a result with a private key of 51 characters and if the missing positions are filled exactly in the place of origin, in any other position the algorithm does not give a response with a valid private key.

Unfortunately in my case I have no idea of the positions of the lost characters, but I keep trying, because it has been very useful for me to learn new skills and resources.