250期：<<02,04,07,09,10,16,20,22,23,24,32,35,36,40,44,47>>开：04有
251期：<<06,08,20,21,22,25,27,28,29,30,32,34,41,44,46,47>>开：41有
252期：<<01,02,06,09,11,20,27,30,33,34,36,38,39,43,46,47>>开：24无
253期：<<02,07,10,17,20,23,24,29,30,41,42,44,45,46,47,48>>开：19无
254期：<<02,06,09,13,15,17,18,19,21,22,28,31,32,34,45,49>>开：13有
255期：<<02,03,04,08,09,13,18,19,24,26,27,31,36,37,38,46>>开：88
