〖0次〗:01,04,09,11,17,18,19,20,22,27,29,32,33,37,40,41,42,43,45,48,49,（共21个）
〖1次〗:02,05,06,08,10,12,13,14,15,16,21,24,26,30,34,35,36,46,47,（共19个）xx
〖2次〗:03,23,25,31,39,（共5个）xxx
〖3次〗:07,28,38,44,（共4个）xxx