K1018 :b^2 c x^2 y+b c^2 x^2 y+c^3 x^2 y-a^2 c x y^2-a c^2 x y^2-c^3 x y^2-b^3 x^2 z-b^2 c x^2 z-b c^2 x^2 z+a^3 y^2 z+a^2 c y^2 z+a c^2 y^2 z+a^2 b x z^2+a b^2 x z^2+b^3 x z^2-a^3 y z^2-a^2 b y z^2-a b^2 y z^2 = 0