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What comes next? K1, M3, O5, Q7, …
S9
S8
Q9
T9
What comes next? H1, J3, L5, N7, …
P8
N9
P9
What comes next? J, V, K, U, L, …
U
S
T
M
What comes next? I, M, Q, U, Y, …
Z
D
C
G
What comes next? K, O, L, N, M, …
L
N