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SHLOMIF / Graph-Easy-0.72 / t / out / 4_joint_bug_flags.txt 
+---+
| E |
+---+
  ^
  |
  |
  |
  |        +---+
  +----+-> | B |
       |   +---+
       |
       |
       |
       |   +---+
       +-> | C |
       |   +---+
       |   +---+
       +-> | D |
           +---+