(CONDITIONTYPE ORIENTED)
(VAR x y)
(RULES
  f(x) -> c(x, y) | g(x) == y, y == h(x)
  a -> b
  g(a) -> h(b)
)
(COMMENT
  \cite{NSS12}, R_8 of Example 4.8
  doi: 10.2168/LMCS-8(3:4)2012
)