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SHLOMIF / Graph-Easy-0.76 / t / out / 3_selfloop_flow_up.txt 
                     +-------+
                     |  End  |
                     +-------+
                       ^
                       |
                       |
    Until not done   +-------+
  +----------------- |       |
  |                  | Main  |
  +----------------> |       |
                     +-------+
                       ^
                       |
                       |
                     +-------+
                     | Start |
                     +-------+