050期:半数【《01,02,03,05,07,08,09,11,13,14,17,21,25,27,32,33,36,37,40,42,43,44,45,49》】开:40准
051期:半数【《02,03,04,06,12,13,15,16,17,18,22,23,26,27,30,31,37,38,39,40,43,44,48,49》】开:28错
052期:半数【《02,03,05,07,09,10,12,15,16,21,23,24,25,26,29,30,31,34,35,36,37,46,48,49》】开:22错
053期:半数【《01,05,06,07,08,09,10,11,18,19,21,22,23,27,28,29,31,32,41,42,43,44,45,48》】开:？？？？