(STRATEGY
    INNERMOST)

(VAR
    x y)
(DATATYPES
    A = µX.< 0, s(X) >)
(SIGNATURES
    times :: [A x A] -> A
    plus :: [A x A] -> A)
(RULES
    times(x,0()) -> 0()
    times(x,s(y)) -> plus(times(x,y)
                         ,x)
    plus(x,0()) -> x
    plus(0(),x) -> x
    plus(x,s(y)) -> s(plus(x,y))
    plus(s(x),y) -> s(plus(x,y)))