||
| |半
| |半半
| |半半半
| |半半半半
| |全
|  |全全
|   |全全全
|    |全全全全
|  |全半
|    |全半全半
|      |全半全半全半
|        |全半全半全半全半

┌──┐
│ │半半半半
│  │全全
│    │全半全半
└──┘

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