Key: B
Introduction:
D[-8---8---x-8---8---8---8-8-8-8-8---8---8---x-8---8---8---8-8-8-8-8-]
A [-6---6---x-6---6---6---6-6-6-6-6---6---6---x-6---6---6---6-6-6-6-6-]
v v n v n v v v n n n n v n v n
D[-8---8---x-8---8---8---8-8-8-8-8---8---8---x-8---8---8---8-8-8-8-8-]
A [-6---6---x-6---6---6---6-6-6-6-6---6---6---x-6---6---6---6-6-6-6-6-]
v v n v n v v v n n n n v n v n
D[-8---8---x-8---8---8---8-8-8-8-8---8---8---x-8---8---8---8-8-8-8-8-]
A [-6---6---x-6---6---6---6-6-6-6-6---6---6---x-6---6---6---6-6-6-6-6-]
v v n v n v v v n n n n v n v n
D[-8---8---x-8---8---8---8-8-8-8-8---8---8---x-8---8---8---8-8-8-8-8-]
A [-6---6---x-6---6---6---6-6-6-6-6---6---6---x-6---6---6---6-6-6-6-6-]
v v n v n v v v n n n n v n v n
D[----8---8---8---8---8---8---8---8-]
A [----6---6---6---6---6---6---6---6-]
v v n v n v v v n n n n v n v n