#include <iostream>
#include <string>
#include <regex>

using namespace std;

int main()
{
    string str = "This new subject is fun";
    regex pattern("This (.*)(sub)(.*) is fun");
    smatch result;

    if (regex_search(str, result, pattern))
    {
        for (int i = 0; i < result.size(); i++)
        {
            cout << result[i] << endl;
        }
    }

    return 0;
}