A, B, C, E, F, G, H, L, N, P, Q, R, S
13
A, B, C, E, F, G, H, I, L, N, O, P, Q, R, S
15
0
A, C, G, I, L, N, O, Q
8
A, C, E, F, G, H, L, N, O, Q
10
B, C, E, F, G, H, I, L, N, O, P, Q, R, S
14
A, C, I, P, R
5
I, R
2
B, I, R, S
4
C, G, H, I, P, R
6
A, B, C, E, F, G, H, L, N, O, P, Q, R, S
B, E, F, G, H, I, L, O, P, S
B, E, Q
3
F, O, Q
A, B, F, H, L, N, O, P
A, S
E, N, S