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A x1 y1 b x2 y2
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A x1 y1 b x2
A x1 y1 b x2 y2
a x1 y1 b x2 y2 brookhaven
a x1 y1 b x2 y2 c x3 y3
a x1 y1 b x2 y2
a x1 y1 b x2 y2 c x3 y3 are the vertices of a triangle
