G, N
2
A, B, C, E, F, G, H, I, L, N, O, P, Q, R, S
15
0
A, B, C, F, G, H, I, L, N, O, P, Q, R, S
14
A, C, F, G, H, L, N, O, P, Q, S
11
B, C, E, G, I, L, N, O, P, Q, R, S
12
A, B, C, H, I, R
6
E, R
A, B, I, L, O, R, S
7
A, B, C, F, G, H, I, O, P, R, S
B, E, F, G, H, I, L, N, O, P, S
E, Q
E, F, Q
3
Q
1
A, C, E, F, H, L, N, P
8