Develop a character repair program to solve the 64-bit key problem

[zhanshen360]

I have an idea, suppose we define the hexadecimal format of the private key as a string of characters, can we develop a program similar to the repair of private key characters,The program supports the definition of any character, hexadecimal characters include 0123456789ABCDEF. Since the 64-bit problem is in a relatively small range, in fact, it can be found only by repairing 16 characters. In addition to address matching, you can also directly use public key matching, so that 256-bit hexadecimal private key collision can be realized. Of course This requires knowing a lot of characters