B, C, E, F, G, H, I, L, N, P, Q, R, S
13
A, B, E, G, H, I, L, N, P, Q, S
11
C, H, I, L, N, Q
6
A, C, E, F, G, H, Q
7
B, E, F, G, L, N, P, Q, S
9
C, G, I, R
4
R
1
A, C, F, H, L, R
A, B, C, F, G, H, R
B, C, I, L, N, P, R, S
8
B, H, I, L, Q, R
A, B, C, E, F, G, I, L, N, P, Q, R, S
A, F, P, S
0
E, F, Q
3
A, B, E, G, H, I, N, P
S
A, E, N, P, S
5