a a x1 a b a b a x1 c a x1 a b a a c x1 b b b x1 a b x1 c b x1 a a c x1 c b x1 b a d x1 d d x1 d b d b d x1 c c x1 c d c x1 a a a x1 a b b x1 a 1 b 1 c 1 d 1 FULL ./SRS/secret07/torpa/x04.srs