b q b x1 b p b x1 0 p 0 x1 q x1 1 p 1 x1 q x1 0 q 0 x1 q x1 1 q 1 x1 q x1 p x1 1 p 1 0 1 x1 b 1 q 1 0 1 1 1 p 1 FULL ./SRS/Zantema06/rel09.srs