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