018期：（（01,10,11,13,17,23,25,26,27,32,33,35,38,41,45,46））开：23中中中
019期：（（05,10,15,16,18,20,22,26,27,29,30,37,39,41,43,48））开：27中中中
020期：（（01,02,07,13,14,21,23,29,30,32,34,36,40,42,48,49））开：16错错错
021期：（（01,03,06,11,12,14,16,19,22,27,37,42,43,44,46,48））开：中？