∅︀
∅︀
\u2205\uFE00
\U002205\U00FE00
\u{2205}\u{FE00}
\U00002205\U0000FE00
\2205\FE00
\002205\00FE00
=E2=88=85=EF=B8=80
%E2%88%85%EF%B8%80