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