B, C, D, E, F, G, J
7
B, C, D, E, G, J
6
B, J
2
C, J
C, E, G, J
4
D, F
B, C, D
3
B
1
C, D, E, F, G
5
B, D, E, F
C, E, F, G, J
F, G, J
B, E, G