(STRATEGY
    INNERMOST)

(VAR
    x y)
(DATATYPES
    A = µX.< true, 0, false, s(X) >)
(SIGNATURES
    cond :: [A x A x A] -> A
    gr :: [A x A] -> A)
(RULES
    cond(true(),x,y) -> cond(gr(x,y)
                            ,y
                            ,x)
    gr(0(),x) -> false()
    gr(s(x),0()) -> true()
    gr(s(x),s(y)) -> gr(x,y))