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