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Using the point A and the point Tb, construct a line b (rule W02);
% DET: points A and Tb are not the same
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Using the point A and the point O, construct a circle k(O,C) (rule W06);
% NDG: points A and O are not the same
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Using the circle k(O,C), the line b, the point O and the point A, construct a point C (rule W05);
% NDG: line b and circle k(O,C) intersect
% DET: points A and C must be different
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Using the point C and the point A, construct a point Mb (rule W01);
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Using the point O and the point Mb, construct a line mb (rule W02);
% DET: points O and Mb are not the same
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Using the circle k(O,C) and the line mb, construct a point Nb and a point Nbk (rule W04);
% NDG: line mb and circle k(O,C) intersect
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Using the point Nb and the point Tb, construct a line sb (rule W02);
% DET: points Nb and Tb are not the same
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Using the circle k(O,C), the line sb, the point O and the point Nb, construct a point B (rule W05);
% NDG: line sb and circle k(O,C) intersect
% DET: points Nb and B must be different