When I first watched the lecture, I could barely understand what was being said, but after some time had passed and I saw that it had been revised once more, I recently watched it again. Since I didn't have a chance to use it directly at work, my learning was a bit slow, but as I watched the revised content again, my eyes gradually became accustomed to it. Haha. Later, when I'm likely to forget it again, I'll watch it again on my way to and from work. Thank you for the lecture.