#include <tuple>
#include <string>
#include <iostream>

int main()
{
{
	std::tuple<const std::string> t(std::string("hello"));
	std::cout << '"' <<std::get<0>(t) << "\"\n";
}

{
	std::tuple<const std::string&> t(std::string("world"));
	std::cout << '"' <<std::get<0>(t) << "\"\n";
 }   
}