1段:01-02-03-04-05-06-07
2段:08-09-10-11-12-13-14
3段:15-16-17-18-19-20-21
4段:22-23-24-25-26-27-28
5段:29-30-31-32-33-34-35
6段:36-37-38-39-40-41-42
7段:43-44-45-46-47-48-49