Using the point E_c and the point M_a, construct a line m(CH_b) (rule W02);

% DET: points E_c and M_a are not the same

Using the point M_a and the point O, construct a line m_a (rule W02);

% DET: points M_a and O are not the same

Using the point M_a and the line m_a, construct a line a (rule W10a);

Using the point E_c and the line m_a, construct a line m(CH_a) (rule W16);

Using the point O and the line m(CH_b), construct a line m_b (rule W16);

Using the line m_b and the line m(CH_a), construct a point M_b (rule W03);

% NDG: lines m_b and m(CH_a) are not parallel

% DET: lines m_b and m(CH_a) are not the same

Using the point M_b and the line m_b, construct a line b (rule W10a);

Using the line b and the line a, construct a point C (rule W03);

% NDG: lines b and a are not parallel

% DET: lines b and a are not the same

Using the point C and the point E_c, construct a point H (rule W01);

Using the point M_a and the point C, construct a point B (rule W01);

Using the point O and the point H, construct a point G (rule W01);

Using the point M_a and the point G, construct a point A (rule W01);