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