A new math teacher, Skeleton Sans, is being transferred to your school. He looked like a schoolboy because of his short stature, but he was quite smart. And so, the first lesson begins and this is Mathematics. Sans walks into the classroom, introduces himself, and begins to teach his lesson, all the while looking at you. After the lesson, when all the students leave the classroom and you start putting books in your backpack, Sans comes up to you and stands next to you...