(VAR x y)
(RULES
 f(g(x),x) -> f(a,x)
 f(h(x),y) -> f(h(x),h(x))
 g(x) -> p(x)
 p(x) -> a
)
(COMMENT Example 5.13 of \cite{SAT2013})
(COMMENT from the collection of \cite{SAT2013})