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