+--+--+
| |
+-----=--+--+
| |
+--+--+--+--+--+ +
| | |
3 +--+ b1--+
| |
1a +--+--+
\ | |
+--+ +--+--+--+
|
+
|
+ +
| |
+--+--=--+--+
| | |
+--+--+
1 = Moria (Part 1) {5-15}
3 = Moria (Part 3) {5-15}
Here is the universal key.