021期：16码≤≤03,04,09,12,13,16,20,21,26,29,32,33,39,43,45,47≥≥开：32对
022期：16码≤≤01,02,07,08,12,15,18,20,22,28,34,35,37,40,43,45≥≥开：09错
023期：16码≤≤04,05,12,16,20,21,23,33,35,40,42,43,46,47,48,49≥≥开：01错
024期：16码≤≤02,03,08,17,19,20,21,23,24,29,31,32,33,37,47,49≥≥开：//