BEST_CASE(Omega(n^1),?)

Solution:
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  "0" :: [] -(0)-> "a"(1)
  "0" :: [] -(0)-> "a"(0)
  "p" :: ["a"(0) x "a"(1) x "a"(1)] -(1)-> "a"(0)
  "s" :: ["a"(1)] -(1)-> "a"(1)


Cost Free Signatures:
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Base Constructors:
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  "\"0\"_a" :: [] -(0)-> "a"(1)
  "\"s\"_a" :: ["a"(1)] -(1)-> "a"(1)