一段:01,02,03,04,05,06,07二段:08,09,10,11,12,13,14三段:15,16,17,18,19,20,21四段:22,23,24,25,26,27,28五段:29,30,31,32,33,34,35六段:36,37,38,39,40,41,42七段:43,44,45,46,47,48,49