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