#    ____                       ____  ________
# __|A   |_____________________|B   ||Z       |__
#
#         ____  ________  ____
# _______|A   ||Z       ||B   |______________
#
#
0 1 A
2 1 A
0 2 A
2 2 A
2 2 Z
6 2 Z
6 2 B
8 2 B
2 1 B
4 1 B
4 1 Z
8 1 Z
