a b x1 b b a x1 b c x1 c b b x1 c a x1 a c c x1 2.2 b c x1 b b x1 c a x1 c x1 a b x1 a x1 a b x1 b b a x1 c a x1 c c x1 b c x1 b x1 b c x1 c b b x1 a b x1 b a x1 c a x1 a c c x1 true c a x1 a c c x1 a b x1 b a x1 b c x1 c b b x1 b c x1 b x1 a b x1 a x1 c a x1 c x1 c a x1 c c x1 a b x1 b b a x1 b c x1 b b x1 true a 1 1 b 1 1 0 c 1 1 4 c 1 3 a 1 2 b 1 1 0 c a x1 c c x1 c a x1 c x1 a b x1 a x1 a b x1 b b a x1 c a x1 a c c x1 b c x1 c b b x1 a b x1 a x1 true a 1 0 b 1 1 1 c 1 0 c 1 0 a 1 1 0 b 1 0 c a x1 c x1 c a x1 c c x1 true a 1 1 1 b 1 41063 c 1 1 0 c 1 1 3 a 1 2 b 1 1 0 a b x1 b b a x1 c a x1 a c c x1 b c x1 c b b x1 NaTT certifiable-1.6