WORST_CASE(?,O(n^1))

Solution:
---------

  "0" :: [] -(0)-> "A"(15)
  "0" :: [] -(0)-> "A"(6)
  "activate" :: ["A"(15)] -(6)-> "A"(2)
  "add" :: ["A"(15) x "A"(15)] -(12)-> "A"(2)
  "cons" :: ["A"(0) x "A"(15)] -(15)-> "A"(15)
  "cons" :: ["A"(0) x "A"(2)] -(2)-> "A"(2)
  "from" :: ["A"(12)] -(15)-> "A"(2)
  "fst" :: ["A"(15) x "A"(15)] -(3)-> "A"(2)
  "len" :: ["A"(15)] -(12)-> "A"(2)
  "n__add" :: ["A"(15) x "A"(15)] -(15)-> "A"(15)
  "n__add" :: ["A"(2) x "A"(2)] -(2)-> "A"(2)
  "n__from" :: ["A"(15)] -(15)-> "A"(15)
  "n__from" :: ["A"(2)] -(2)-> "A"(2)
  "n__fst" :: ["A"(15) x "A"(15)] -(0)-> "A"(15)
  "n__fst" :: ["A"(2) x "A"(2)] -(0)-> "A"(2)
  "n__fst" :: ["A"(10) x "A"(10)] -(0)-> "A"(10)
  "n__len" :: ["A"(15)] -(15)-> "A"(15)
  "n__len" :: ["A"(2)] -(2)-> "A"(2)
  "n__len" :: ["A"(3)] -(3)-> "A"(3)
  "nil" :: [] -(0)-> "A"(15)
  "nil" :: [] -(0)-> "A"(12)
  "s" :: ["A"(15)] -(15)-> "A"(15)
  "s" :: ["A"(3)] -(3)-> "A"(3)
  "s" :: ["A"(2)] -(2)-> "A"(2)


Cost Free Signatures:
---------------------

  "0" :: [] -(0)-> "A"_cf(0)
  "activate" :: ["A"_cf(0)] -(0)-> "A"_cf(0)
  "add" :: ["A"_cf(0) x "A"_cf(0)] -(0)-> "A"_cf(0)
  "cons" :: ["A"_cf(0) x "A"_cf(0)] -(0)-> "A"_cf(0)
  "from" :: ["A"_cf(0)] -(0)-> "A"_cf(0)
  "fst" :: ["A"_cf(0) x "A"_cf(0)] -(0)-> "A"_cf(0)
  "len" :: ["A"_cf(0)] -(0)-> "A"_cf(0)
  "n__add" :: ["A"_cf(0) x "A"_cf(0)] -(0)-> "A"_cf(0)
  "n__from" :: ["A"_cf(0)] -(0)-> "A"_cf(0)
  "n__fst" :: ["A"_cf(0) x "A"_cf(0)] -(0)-> "A"_cf(0)
  "n__len" :: ["A"_cf(0)] -(0)-> "A"_cf(0)
  "nil" :: [] -(0)-> "A"_cf(0)
  "s" :: ["A"_cf(0)] -(0)-> "A"_cf(0)


Base Constructors:
------------------
  "\"0\"_A" :: [] -(0)-> "A"(1)
  "\"cons\"_A" :: ["A"(0) x "A"(1)] -(1)-> "A"(1)
  "\"n__add\"_A" :: ["A"(0) x "A"(0)] -(1)-> "A"(1)
  "\"n__from\"_A" :: ["A"(0)] -(1)-> "A"(1)
  "\"n__fst\"_A" :: ["A"(0) x "A"(0)] -(0)-> "A"(1)
  "\"n__len\"_A" :: ["A"(0)] -(1)-> "A"(1)
  "\"nil\"_A" :: [] -(0)-> "A"(1)
  "\"s\"_A" :: ["A"(1)] -(1)-> "A"(1)