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