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      |     |     |     |                    |
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|     |  |  |  |     |        |     |     |  |
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|     |     |     |     |     |  |  |  |     |
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|  |     |     |     |  |     |  |  |  |     |
+  +  +--+--+--+--+--+  +  +  +  +  +--+--+  +
|  |     |     |           |     |           |
+  +--+  +  +  +  +--+  +--+--+--+--+--+--+--+
|        |  |     |     |  |              |  |
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|     |     |        |     |  |     |     |  |
+  +--+--+--+--+  +--+  +--+  +--+  +  +--+  +
|                       |     |     |  |     |
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|  |     |  |     |     |     |     |  |  |  |
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|     |  |  |  |        |     |  |  |     |  |
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|     |        |  |        |     |           |
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|     |        |  |  |     |                 |
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|  |        |  |  |     |  |     |     |     |
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|  |     |  |  |        |  |  |     |     |  |
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|        |                 |           |      
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