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