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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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