#include <vector>
#include <string>
#include <iostream>
std::vector<std::string> operator<<(std::vector<std::string>&& op, std::string str)
{
op.push_back(std::move(str));
return op;
}
int main()
{
std::vector<std::string> a = std::vector<std::string>() << "A" << "B";
return 0;
}
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