Set

Original expression

-[\u0000-\u25A0\u25A2-\u25CA\u25CC-\u{10FFFF}] Copy

Normalized

[\u25A1\u25CB] Copy

Perl

[\x{25A1}\x{25CB}] Copy

Complemetary

Characters (2)

• □ U+25A1
• ○ U+25CB