260117, 260121, 260921, 260925, 260928, 270301, 280101, 280105, 280125 - Two concentric circles. Circles that are totally or partially shaded. Squares that are completely or partially shaded. Squares with curved sides. Miscellaneous designs with overall square shape. Geometric figures forming letters or numerals, including punctuation. Inscriptions in Arabic characters. Inscriptions in Greek characters, including the following: Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ς Σ σ Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω. Inscriptions in other non-Latin characters, including Cyrillic (Russian) or hieroglyphic characters.