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