MAYBE

Proof:
ConCon could not decide if this system is quasi-decreasing.
\cite{O02}, p. 214, Proposition 7.2.50 does not apply.
System R transformed to U(R).
Call external tool:
ttt2 - trs 30
Input:
  a -> c
  a -> d
  b -> c
  b -> d
  c -> e
  c -> l
  d -> m
  k -> l
  k -> m
  h(x, x) -> g(x, x, f(k))
  g(d, x, x) -> A
  A -> h(f(a), f(b))
  ?1(e, x) -> x
  f(x) -> ?1(x, x)

The external tool could not decide termination.