Quick info about what i found all out i double check now the given Addresses, and yes they are bitcoin addresses.

Then i do the offline search with the scripts forward backward front reverse ....

My main question is, does it make a difference on a clear ECDSA private key if i put the letters all in Upper or not because i realize that on the side of "tp´s go bitcoin tests" where i only look how a real key looks like. all is in upper letters.

And thanks for all help.