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