a c b b x1 b b b c x1 b b c x1 b a b b x1 c a a a x1 a c x1 b b b x1 c b a c x1 2.2 b b c x1 a b b x1 c a a a x1 c x1 b b b x1 a c x1 a c b b x1 b c x1 b b b x1 c b a c x1 b b b x1 b a c x1 b b b x1 c x1 a c b b x1 b b b c x1 a c b b x1 c x1 c a a a x1 a c x1 b b c x1 b b x1 b b c x1 b a b b x1 a c b b x1 b b c x1 b b c x1 b x1 true b b c x1 b x1 b b b x1 c x1 b b b x1 b a c x1 a c b b x1 b b c x1 b b c x1 b a b b x1 b b c x1 b b x1 b b b x1 c b a c x1 a c b b x1 b c x1 b b b x1 a c x1 c a a a x1 c x1 c a a a x1 a c x1 a c b b x1 c x1 a c b b x1 b b b c x1 b b c x1 a b b x1 true Failed! NaTT certifiable-1.6