devops/perl/lib/Graph-Easy-0.76/t/out/6_ranks.txt

+---+     +---+     +---+
| A | --> | B | --> | C |
+---+     +---+     +---+
                      |
  +-------------------+
  v
+---+     +---+
| D | --> | E |
+---+     +---+
            |
  +---------+
  v
+---+
| F |
+---+