Dear Aleksey, I’m letting you know that I’ve received the material you sent, and I have watched all 8 disks. I have no words to describe my impressions. The only regret is that I haven’t had it before, as I’m 65 years old, but I think it will be useful to my grandchildren if they feel like working in this area.
Thank you for your job! I wish you further success in your good deeds. I wish you the best of luck and health.