My idea is precalculate this part: **7ae41e4649b934c****991b7852b855 and just brute force the second.
if all the missing characters were together then it can be solved with BSGS in seconds
Can you explain (maybe there are ready-made solutions):
1. How to split the private key into parts and brute through it in parts?
2. How to brute a private key with missing characters together?