018期：一条龙[[01,02,03,05,06,07,10,11,13,14,20,21,23,24,26,27,28,33,34,35,36,42,43,47]]开：10准
019期：一条龙[[05,08,09,10,15,18,19,20,21,22,24,30,31,33,34,35,36,39,40,42,44,47,48,49]]开：06错
020期：一条龙[[02,03,04,05,07,09,10,11,12,14,15,16,17,22,23,26,29,31,34,39,45,46,47,48]]开：34准
021期：一条龙[[03,04,05,06,07,08,09,10,11,12,13,14,17,19,21,23,24,25,28,30,31,32,43,49]]开：？