WORST_CASE(?,O(n^2))

Solution:
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  "c" :: ["A"(15, 15)] -(15)-> "A"(0, 15)
  "c" :: ["A"(0, 0)] -(0)-> "A"(0, 0)
  "f" :: ["A"(2, 0) x "A"(0, 15)] -(11)-> "A"(14, 14)
  "s" :: ["A"(2, 0)] -(2)-> "A"(2, 0)
  "s" :: ["A"(0, 0)] -(0)-> "A"(0, 15)


Cost Free Signatures:
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Base Constructors:
------------------
  "\"c\"_A" :: ["A"(0, 0)] -(0)-> "A"(1, 0)
  "\"c\"_A" :: ["A"(1, 1)] -(1)-> "A"(0, 1)
  "\"s\"_A" :: ["A"(1, 0)] -(1)-> "A"(1, 0)
  "\"s\"_A" :: ["A"(0, 0)] -(0)-> "A"(0, 1)