
  .................................................
  :                                               v
+-------+     +----------+     +----------+     +---------+     +---------+
| 1Bonn | --> |   1Ulm   | --> | 1Bautzen | --> | 1Berlin | --> | 1Kassel |
+-------+     +----------+     +----------+     +---------+     +---------+
  !             |
  !             |
  !             v
  !           +----------+
  +-.-.-.-.-> | 1Koblenz |
              +----------+

  .................................................
  :                                               v
+-------+     +----------+     +----------+     +---------+     +---------+
| Bonn  | --> |   Ulm    | --> | Bautzen  | --> | Berlin  | --> | Kassel  |
+-------+     +----------+     +----------+     +---------+     +---------+
  !             |
  !             |
  !             v
  !           +----------+
  +-.-.-.-.-> | Koblenz  |
              +----------+

  .................................................
  :                                               v
+-------+     +----------+     +----------+     +---------+     +---------+
| 2Bonn | --> |   2Ulm   | --> | 2Bautzen | --> | 2Berlin | --> | 2Kassel |
+-------+     +----------+     +----------+     +---------+     +---------+
  !             |
  !             |
  !             v
  !           +----------+
  +-.-.-.-.-> | 2Koblenz |
              +----------+
