A, B, C, E, F, G
6
0
A, B, C, E, F
5
E, G
2
B, F, G
3
A, C, F
G
1
A, B, C, F
4
A, F
C, E
A, B, E, F, G
B, C, E, F, G
A, B, C, E, G
A, B, G
C, E, G
A