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