I am a developer working in the US. I listened to the lecture without any expectations, but it was the best lecture. Normally, if you go into detail, the explanation becomes longer and if you are not careful, it can be more difficult to explain, and the listener may not be able to follow, but on the contrary, you explained it so easily and concluded it well, so I listened to it until the end while slowly understanding it as if watching a movie. Thank you for providing such a great lecture.