Using the point M_b and the point H_b, construct a line b (rule W02);

% DET: points M_b and H_b are not the same

Using the point H_a and the point M_b, construct a circle k(M_b,C) (rule W06);

% NDG: points H_a and M_b are not the same

Using the circle k(M_b,C) and the line b, construct a point C and a point A (rule W04);

% NDG: line b and circle k(M_b,C) intersect

Using the point H_a and the point C, construct a line a (rule W02);

% DET: points H_a and C are not the same

Using the point H_b and the line b, construct a line h_b (rule W10b);

Using the line h_b and the line a, construct a point B (rule W03);

% NDG: lines h_b and a are not parallel

% DET: lines h_b and a are not the same