A, B, C, D
A, E, F, G
A, H, I, J
A, K, L, M
A, N, O, P
A, Q, R, S
A, T, U, V
B, E, H, K
B, F, I, L
B, G, J, M
B, N, Q, T
B, O, R, U
B, P, S, V
C, E, I, M
C, F, H, N
C, G, K, O
C, J, L, P
C, Q, U, W
C, R, T, X
D, E, J, N
D, F, K, P
D, G, H, L
D, I, O, Q
D, M, R, V
D, S, T, W
E, L, O, S
E, P, Q, X
F, J, O, T
F, M, S, U
F, V, W, X
G, I, N, R
H, M, O, W
I, K, S, X
J, K, Q, V
L, N, U, X
35 combinations