+---+---+---+---+---+---+---+---+
| C | h | 1 |   |   | C | h | 2 |
+---+---+---+---+---+---+---+---+
| 1 | 0 | 3 |   |   | 1 | 4 | 9 |
+---+---+-=-+---+---+---+---+-=-+