〖0次〗:02,03,04,05,06,07,09,11,13,14,17,23,26,27,28,30,31,33,36,39,44,45,（共22个）

〖1次〗:10,16,18,19,25,29,32,37,38,40,41,43,46,48,（共14个）x'x
〖2次〗:01,08,15,20,21,22,24,34,42,47,（共10个）x'x'x
〖3次〗:12,35,49,（共3个）x'x'x