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