+---------------------+
| A |
| +-----+-----+ |
| | 33 | | |
| | | 3 | |
+------+--+-----+-----+------+------+
| | | | 2 | | |
| 40 |2 |-----+-----| 14 | |
| (none)| | | 1 | (B only) |
+------+--+-----+-----+------+------+
| | 5 | | |
| | (C) | | |
| +-----+-----+ |
| B |
+---------------------+