048期：03,04,05,08,11,15,16,18,19,20,21,22,24,28,30,32,33,34,37,42,43,44,47,49··（共半数）开49准
049期：01,02,03,04,08,13,14,15,16,18,20,21,22,26,27,30,31,34,36,38,39,41,44,48··（共半数）开08准
050期：05,08,12,13,16,18,21,22,25,26,28,29,32,34,36,37,38,39,40,42,43,44,46,48··（共半数）开40准
051期：01,02,04,09,12,13,14,15,17,23,25,26,28,31,32,33,36,38,39,40,43,44,45,49··（共半数）开28准
052期：01,02,04,05,08,09,13,15,16,17,20,23,24,25,26,29,30,31,35,39,40,44,47,48··（共半数）开22错
053期：02,03,06,08,10,11,13,14,15,17,22,24,25,26,28,29,30,34,35,36,41,44,45,49··（共半数）开？？！