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TELS / Graph-Easy-0.64 / t / out / dot / 9_stacking.txt 
+---+     +----+     +----+     +---+     +---+     +---+     +---+     +---+
| 0 | --> | 11 | --> | 1  | --> | 2 | --> | 3 | --> | 8 | --> | 5 | --> | 6 |
+---+     +----+     +----+     +---+     +---+     +---+     +---+     +---+
                       |                                                  ^
                       |                                                  |
                       v                                                  |
                     +----+                                               |
                     | 10 | ----------------------------------------------+
                     +----+