a c a x1 a c b x1 b b c x1 b c c x1 c c b x1 c a b x1 b a a x1 a b a x1 b a c x1 a b a x1 a c a x1 b c c x1 b c a x1 b a a x1 a 1 b 1 c 1 FULL random-52.srs