(STRATEGY
    INNERMOST)

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