(STRATEGY
    INNERMOST)

(VAR
    x)
(DATATYPES
    A = µX.< 0, 1, s(X), +(X, X) >)
(SIGNATURES
    f :: [A] -> A
    g :: [A] -> A)
(RULES
    f(0()) -> 1()
    f(s(x)) -> g(f(x))
    g(x) -> +(x,s(x))
    f(s(x)) -> +(f(x),s(f(x))))