1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
# ____ # ____ ____ ____ ________ ____|Z |____ # __|A ||Z ||B ||Z ||C |__ # 0 1 A 2 1 A 2 1 Z 4 1 Z 4 1 B 6 1 B 6 1 Z 10 1 Z 10 1 C 12 1 Z 14 1 Z 16 1 C