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