b d b x1 c d b x1 b a c x1 b c x1 a d x1 d c x1 b b b x1 a b c x1 d c x1 b d x1 d c x1 d b d x1 d a c x1 b b x1 b 1 d 1 c 1 a 1 FULL ./SRS/Zantema/z083.srs