+ Thrull
| 1
x /
+--+ + o
| | | /
+--+--+ + + + + +
| |\ | | o o o
+--+--+ +--+--+--+--+--+--+o-+--+--+--+--+--+x-+
| | | | o o
+ + +--+ +-o+o-+ + +
| |
+ +-o+o-+
| /
+ /
|
+ |
/ |
+ |
/| |
/-------/ | |
/ | |
+ +-o+o-+ |
| | |
+-x+x-+ +-o+o-+ |
| | |
+ +-o+o-+ |
| | /
+-x+--+ | /-------/
| |/
+--+--+ +-o+o-+
|
+
|
+
|
+ +
| |
+--+
| |
+ +--+
|
+
1 = Thrull {1-50}
Here is the universal key.