(STRATEGY
    INNERMOST)

(VAR
    x y)
(DATATYPES
    A = µX.< c(X, X), s(X) >)
(SIGNATURES
    f :: [A] -> A
    g :: [A] -> A)
(RULES
    f(c(s(x),y)) -> f(c(x,s(y)))
    f(c(s(x),s(y))) -> g(c(x,y))
    g(c(x,s(y))) -> g(c(s(x),y))
    g(c(s(x),s(y))) -> f(c(x,y)))