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