#include <string>
#include <iostream>
#include <regex>
using namespace std;
 
int main() {
	std::regex r(R"([^\W_]+(?:['_-][^\W_]+)*)");
	std::string s = "Hello, world! Aren't you clever? 'Later', she said. Maybe 5 o'clock?' In the year 2017 ... G2g, cya l8r hello_world.h Hermione's time-turner. Good mor~+%g. Hi' Testing_ Bye- The kids' toys";
	for(std::sregex_iterator i = std::sregex_iterator(s.begin(), s.end(), r);
                             i != std::sregex_iterator();
                             ++i)
    {
        std::smatch m = *i;
        std::cout << m.str() << '\n';
    }
	return 0;
}
 

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