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