#    ____             ____  ____      ____
# __|A   |___________|B   ||Z   |____|Z   |_______
#
#         ____  ____             ____      ____
# _______|Z   ||A   |___________|B   |____|Z   |__
#
#
0 1 A
2 1 A
0 2 Z
2 2 Z
2 2 A
4 2 A
2 1 B
4 1 B
4 1 Z
6 1 Z
4 2 B
6 2 B
6 1 Z
8 1 Z
6 2 Z
8 2 Z
