devops/perl/lib/Graph-Easy-0.76/t/out/5_flow.txt

+---------+     +-----------+
|  Bonn   | --> |  Berlin   |
+---------+     +-----------+
  |
  |
  v
+---------+     +-----------+     +-----+
| Cottbus | --> | Moselkern | --> | Ulm |
+---------+     +-----------+     +-----+