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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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|     |                 |              |      
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