251期：←24码→（04,05,06,07,09,10,12,13,14,18,19,21,23,24,28,30,33,35,40,41,43,44,47,49）开：41准
252期：←24码→（04,05,07,10,11,13,16,18,19,20,21,27,28,30,32,33,34,35,37,39,43,44,45,46）开：24错
253期：←24码→（02,04,06,07,08,09,11,12,14,17,21,22,25,26,31,34,36,38,39,40,44,45,46,49）开：19错
254期：←24码→（02,03,05,06,09,14,15,17,20,25,26,27,28,30,32,33,36,37,38,42,43,44,45,47）开：？？