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