+----+------------+
| id | pId |
+----+------------+
| 0 | -1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 7 |
| 12 | 1 |
| 13 | 7 |
| 14 | 7 |
| 15 | 7 |
| 16 | 7 |
| 17 | 0 |
| 18 | 7 |
| 24 | 17 |
+----+------------+
