| | ⒈ | | | ⒉ | 0 | | | ⒊ 0 | ⒋ | | ① | ② 0 0 | ③ | ⒌ | 1 | 0 | ⒍ | | ⒎ | ① | ② 0 | ③ 0 | ④ | ⑤ | ⒏ | ① | | ② | | | ③ | | ④ | | | | ⑤ | | | ⒐ | ① | | | | 0 | ② | | ③ | | | 0 0 | ④ | | ⑤ n | | B | | b 0 | 0 |