277期：16码≤≤13,14,15,16,18,20,21,22,23,29,35,37,39,44,48,49≥≥开：16对
278期：16码≤≤06,09,10,13,14,16,19,21,27,30,31,32,35,37,39,40≥≥开：28错
279期：16码≤≤11,12,14,18,19,25,28,32,33,37,38,39,41,43,44,48≥≥开：27错
280期：16码≤≤06,07,14,17,18,20,21,23,29,31,35,38,40,44,47,49≥≥开：//