1 2 3 4 5 6 7 8 9 10 11 12 13
# ____ ____ ____ ____ ____ # __|A ||A ||B ||B ||Z |__ # 0 1 A 2 1 A 2 1 A 4 1 A 4 1 B 6 1 B 6 1 B 8 1 B 8 1 Z 10 1 Z