b a a b b x1 a a b b b a a x1 2.2 b a a b b x1 b b a a x1 b a a b b x1 b a a x1 b a a b b x1 b b b a a x1 true b a a b b x1 b b b a a x1 b a a b b x1 b a a x1 b a a b b x1 b b a a x1 true a 1 1 0 b 1 1 2438 b 1 1 0 b a a b b x1 b b b a a x1 b a a b b x1 a a b b b a a x1 b a a b b x1 b b b a a x1 true Failed! NaTT certifiable-1.6