NO a a x a b b c x b a x x c b x a c x 2.1 b c b b a a c_1 1 c b x a c x b a c b a a c_1 b a x x c b a a c_1 1 b a x x c a c_1 b c b b a a c_1 1 1 1 b a x x b c b a c_1 1 1 b a x x b c c_1 a 1 b 1 1 c 1 1 c_1 0 a 0 4 c_1 0 3 c 1 2 b 1 1 ACP 0.72