Hamilton-圈

G 2

G 3

G 4

G 5

G 7

G 8

完美匹配的交

M 3 M 6 =

M 2 M 6 =

M 5 M 9 =

M 4 M 9 =

M 1 M 8 =

M 1 M 6 =

完美匹配的不交并

M 3 ˙ M 6

M 2 ˙ M 6

M 5 ˙ M 9

M 4 ˙ M 9

M 1 ˙ M 8

M 1 ˙ M 6