247期：←24码→（02,03,04,06,07,08,18,19,21,24,25,27,28,29,30,31,32,34,40,41,45,46,47,49）开：27准
248期：←24码→（02,04,07,08,10,14,15,17,18,23,24,25,29,31,32,33,34,39,41,42,43,44,45,47）开：03错
249期：←24码→（01,03,04,05,06,07,08,09,10,12,15,17,20,21,24,27,28,30,32,33,36,37,40,41）开：31错
250期：←24码→（01,03,05,06,10,12,16,17,18,20,21,25,26,27,29,33,34,35,40,43,44,45,46,47）开：？？