30
20
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|           |           |                           |                                               |   |   |           |
+   +---+   +   +---+   +   +---+   +   +   +   +   +---+---+   +---+---+---+---+---+   +   +---+---+   +   +---+   +   +
|       |   |       |           |   |   |   |   |           |               |   |   |   |   |       |   |       |   |   |
+   +   +---+   +   +---+---+---+---+   +---+   +   +---+   +   +---+---+---+   +   +---+---+   +---+   +---+   +   +---+
|   |           |                   |   |   |   |       |           |   |       |       |       |       |       |       |
+   +---+---+---+---+---+   +   +---+---+   +---+   +   +---+   +---+   +   +   +---+   +   +   +   +   +   +---+---+   +
|                       |   |                   |   |   |               |   |               |       |   |       |       |
+   +---+   +---+---+   +---+   +---+---+---+---+   +---+   +   +---+---+   +---+---+---+   +   +---+---+   +---+   +---+
|       |       |       |           |       |       |   |   |       |                   |   |               |           |
+   +   +---+   +   +---+   +   +---+   +---+   +   +   +   +   +   +   +---+---+---+   +   +---+   +---+   +   +---+   +
|   |       |   |   |   |   |       |           |       |   |   |       |               |   |       |   |   |       |   |
+---+   +---+   +   +   +   +   +   +---+   +   +---+   +   +   +   +---+---+   +---+---+   +---+   +   +---+---+---+   +
|       |       |   |   |   |   |       |   |       |   |   |   |           |           |       |       |           |   |
+   +---+   +   +   +   +---+   +   +   +---+---+   +   +---+   +---+---+---+   +---+---+---+   +---+---+   +---+   +   +
|   |       |   |       |       |   |       |       |       |   |       |                   |                   |   |   |
+   +---+   +---+   +---+---+   +   +---+---+   +   +---+---+---+   +---+---+---+---+   +---+---+---+---+   +   +---+   +
|   |       |       |           |           |   |                   |   |           |       |           |   |       |   |
+---+---+---+---+   +---+   +   +   +---+---+   +---+---+---+---+---+   +   +---+---+---+   +   +---+   +   +---+---+   +
|                   |       |   |       |           |           |                       |       |   |   |       |       |
+   +---+   +   +---+   +   +   +   +---+   +---+   +   +---+---+   +---+   +   +---+---+---+---+   +---+---+---+   +---+
|   |       |   |       |   |   |   |       |       |                   |   |       |   |                       |       |
+   +   +---+---+---+   +---+---+---+   +---+   +   +   +---+   +---+---+---+---+---+   +   +   +---+---+---+   +---+   +
|   |       |   |                   |   |       |           |                           |   |   |   |           |   |   |
+   +---+---+   +---+---+   +---+---+   +---+---+---+   +---+   +---+---+---+---+---+   +   +---+   +   +---+---+   +   +
|                       |           |       |               |                       |       |               |           |
+---+---+---+   +---+---+---+---+   +---+---+---+---+   +   +---+---+---+---+   +   +---+---+---+   +   +---+   +---+---+
|       |   |       |           |   |   |       |       |   |               |   |           |   |   |   |               |
+   +   +   +---+   +---+---+   +---+   +   +---+   +---+   +   +---+   +   +---+   +   +   +   +   +---+---+---+---+   +
|   |           |               |               |   |   |           |   |       |   |   |       |   |               |   |
+   +   +---+   +   +---+   +   +---+   +---+   +   +   +---+---+   +   +---+---+---+   +---+---+   +---+---+   +---+   +
|   |   |   |           |   |       |   |   |       |               |   |               |           |       |       |   |
+---+   +   +   +   +---+---+---+   +   +   +   +---+---+---+---+   +   +   +   +   +---+---+   +---+   +---+   +   +   +
|       |       |       |           |       |                   |   |   |   |   |       |               |   |   |       |
+   +   +---+   +---+---+---+   +---+---+   +---+   +   +   +---+   +   +---+---+   +   +---+---+---+---+   +   +---+   +
|   |       |   |       |       |               |   |   |       |   |           |   |       |   |           |   |       |
+   +   +   +   +   +   +   +   +---+   +---+---+---+---+---+   +---+---+   +   +---+   +   +   +   +---+---+   +---+---+
|   |   |   |   |   |       |   |       |       |       |   |   |           |       |   |                       |       |
+   +---+---+---+---+---+---+   +---+   +---+   +   +---+   +---+   +---+   +---+---+---+---+---+   +---+   +---+   +---+
|                       |           |       |                           |               |               |               |
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
