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