015期：((03,10,12,14,15,17,23,26,27,33,37,39,41,42,43,47))开：42准
016期：((01,08,11,12,14,15,16,19,24,27,31,34,36,41,44,45))开：12准
017期：((02,03,06,08,11,13,14,20,21,23,34,36,38,39,40,43))开：04错
018期：((01,05,09,15,17,24,28,29,31,32,33,34,39,42,46,48))开：31准
019期：((03,06,08,17,19,25,29,30,36,37,39,40,42,45,47,49))开：40准
020期：((03,04,06,09,10,12,15,20,22,26,31,32,33,36,41,47))开：==？