| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | those at the top | 28 |
|
| 2 | those at the bottom | 21 |
|
| 3 | those at the back | 8 |
|
| 4 | those at the front | 6 |
|
| 5 | those at the centre | 5 |
|
