273期：02,03,04,05,07,08,09,10,13,14,15,17,18,20,21,22,25,27,33,34,36,37,39,43,44,46,47,48··（共半数）开04准
274期：01,02,04,06,08,09,10,17,18,20,22,24,25,26,27,32,33,34,35,36,37,38,40,42,45,46,48,49··（共半数）开44错
275期：02,04,07,08,09,12,14,15,16,18,19,21,22,23,24,29,33,34,36,38,42,43,44,45,46,47,48,49··（共半数）开？？！