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