Years ago I doomed my Bitcoin. I searched every device and USB from back then and found something.

I have split it into 2 different files. It is 40 characters long, machine-generated and consists only of capital letters and numbers. Unfortunately, I can only find the first file.

I have the first 20 characters. Any chance of guessing the last 20 characters because it consists only of capital letters and numbers?

If it were possible, I could perhaps rent a server. I don't want someone else to do this because I don't want to give away the wallet files. I think you can understand that.