-----
|o o|
|o o|
|o o|
-----
-----
|o o|
| o |
|o o|
-----
-----
|o o|
|   |
|o o|
-----
-----
|o  |
| o |
|  o|
-----
-----
|o  |
|   |
|  o|
-----
-----
|   |
| o |
|   |
-----
