TRS: { a__sel(s(X), cons(Y, Z)) -> a__sel(mark(X), mark(Z)), a__sel(0(), cons(X, Z)) -> mark(X), a__first(0(), Z) -> nil(), a__first(s(X), cons(Y, Z)) -> cons(mark(Y), first(X, Z)), a__from(X) -> cons(mark(X), from(s(X))), a__sel1(s(X), cons(Y, Z)) -> a__sel1(mark(X), mark(Z)), a__sel1(0(), cons(X, Z)) -> a__quote(X), a__first1(0(), Z) -> nil1(), a__first1(s(X), cons(Y, Z)) -> cons1(a__quote(Y), a__first1(mark(X), mark(Z))), a__quote(0()) -> 01(), a__quote1(cons(X, Z)) -> cons1(a__quote(X), a__quote1(Z)), a__quote1(nil()) -> nil1(), a__quote(s(X)) -> s1(a__quote(X)), a__quote(sel(X, Z)) -> a__sel1(mark(X), mark(Z)), a__quote1(first(X, Z)) -> a__first1(mark(X), mark(Z)), a__unquote(01()) -> 0(), a__unquote(s1(X)) -> s(a__unquote(mark(X))), a__unquote1(nil1()) -> nil(), a__unquote1(cons1(X, Z)) -> a__fcons(a__unquote(mark(X)), a__unquote1(mark(Z))), a__fcons(X, Z) -> cons(mark(X), Z), mark(sel(X1, X2)) -> a__sel(mark(X1), mark(X2)), mark(first(X1, X2)) -> a__first(mark(X1), mark(X2)), mark(from(X)) -> a__from(mark(X)), mark(sel1(X1, X2)) -> a__sel1(mark(X1), mark(X2)), mark(quote(X)) -> a__quote(X), mark(first1(X1, X2)) -> a__first1(mark(X1), mark(X2)), mark(quote1(X)) -> a__quote1(X), mark(unquote(X)) -> a__unquote(mark(X)), mark(unquote1(X)) -> a__unquote1(mark(X)), mark(fcons(X1, X2)) -> a__fcons(mark(X1), mark(X2)), mark(s(X)) -> s(mark(X)), mark(cons(X1, X2)) -> cons(mark(X1), X2), mark(0()) -> 0(), mark(nil()) -> nil(), mark(nil1()) -> nil1(), mark(cons1(X1, X2)) -> cons1(mark(X1), mark(X2)), mark(01()) -> 01(), mark(s1(X)) -> s1(mark(X)), a__sel(X1, X2) -> sel(X1, X2), a__first(X1, X2) -> first(X1, X2), a__from(X) -> from(X), a__sel1(X1, X2) -> sel1(X1, X2), a__quote(X) -> quote(X), a__first1(X1, X2) -> first1(X1, X2), a__quote1(X) -> quote1(X), a__unquote(X) -> unquote(X), a__unquote1(X) -> unquote1(X), a__fcons(X1, X2) -> fcons(X1, X2)} Fail