(STRATEGY
    INNERMOST)

(VAR
    X X1 X2 Y Z)
(DATATYPES
    A = µX.< cons(X, X), from(X), s(X), 2nd(X) >)
(SIGNATURES
    a__2nd :: [A] -> A
    a__from :: [A] -> A
    mark :: [A] -> A)
(RULES
    a__2nd(cons(X,cons(Y,Z))) ->
      mark(Y)
    a__from(X) -> cons(mark(X)
                      ,from(s(X)))
    mark(2nd(X)) -> a__2nd(mark(X))
    mark(from(X)) ->
      a__from(mark(X))
    mark(cons(X1,X2)) ->
      cons(mark(X1),X2)
    mark(s(X)) -> s(mark(X))
    a__2nd(X) -> 2nd(X)
    a__from(X) -> from(X))