===0===
| d|g |
|1|2|3|
=======
| | |
------ | -------
===1=== ===2=== ===3===
|a|b|c| |d|e|f| |g|h|i|
|-|-|-| |-|-|-| |-|-|-|
|*|*|*| |*|*|*| |*|*|*|