(CONDITIONTYPE ORIENTED)
(VAR x y)
(RULES
  f(x) -> x | x == e
  g(d, x, y) -> A | y == x
  h(x, y) -> g(x, y, f(k)) | y == x
  a -> c
  a -> d
  b -> c
  b -> d
  c -> e
  c -> l
  k -> l
  k -> m
  d -> m
)
(COMMENT
  \cite{NSS12}, R_6 of Example 4.1
  doi: 10.2168/LMCS-8(3:4)2012
)