(1,6)=1
(2,6)=2
(3,6)=3
(4,6)=2
(5,6)=1
(6,6)=6
(7,6)=1
(8,6)=2
(9,6)=3
(10,6)=2
(11,6)=1
(12,6)=6
.
规律是1,2,3,2,1,6循环