I think there are two reasons about that question. I am not a scientist, so I don't know exactly. But I guess some people are much better studying than other people because they really work hard or they have intelligence. If a person works hard, I think that person can have very good result. And if that person is intelligent, they can have a good result by working less harder than others. But I think they have to work hard too. I don't think anyone can have a great result without working hard.