||Wednesday, January 07, 2004
(2) Quadrilaterals containing one or more letters
(3) Quadrilateral figures with one or more convex or concave sides -- Note: Not including elongated surfaces with one or more convex or concave sides (25.3.1).
(4) Two quadrilaterals, one inside the other
(5) Letters presenting a special form of writing
(6) Letters repeated by mirror effect or symmetrically in any position
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