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SHLOMIF / Graph-Easy-0.72 / t / out / 3_cache_bug.txt 
+ - - - +
' G     '
'       '
' +---+ '
' | A | ' ------+
' +---+ '       |
'       '       |
+ - - - +       |
                |
                | C
                v
              +----+
              | B  | -->
              +----+