Design Feature:
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(1) One circle
(2) Circles with dark surfaces or parts of surfaces
(3) Several triangles, juxtaposed, joined or intersecting
(4) Triangles with dark surfaces or parts of surfaces
(5) Squares
(6)
(7) Quadrilaterals containing one or more circles, ellipses or polygons (specify the content)
(8) Quadrilaterals containing one or more triangles or lines forming an angle (specify the content)
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