#include <iostream>
#include <string>
#include <regex>
#include <iterator>
int main ()
{
std::wregex e (L"[\u26A0\u24C2\u267B]");
std::wstring s (L"test \u26A0 \u24C2 \u267B test");
std::wcout << std::regex_replace (s,e,L"null");
return 0;
}
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