WORST_CASE(?,O(n^1))

Solution:
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  "a__f" :: ["A"(0)] -(1)-> "A"(0)
  "f" :: ["A"(2)] -(2)-> "A"(2)
  "f" :: ["A"(0)] -(0)-> "A"(0)
  "g" :: ["A"(2)] -(2)-> "A"(2)
  "g" :: ["A"(0)] -(0)-> "A"(0)
  "h" :: ["A"(2)] -(2)-> "A"(2)
  "h" :: ["A"(0)] -(0)-> "A"(0)
  "mark" :: ["A"(2)] -(0)-> "A"(0)


Cost Free Signatures:
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Base Constructors:
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