#include <iostream>                /* C++ iostream            C++98/11 */
#include <string>                  /* C++ strings             C++98/11 */
#include <boost/regex.hpp>   
#include <boost/algorithm/string.hpp>
/* RegEx                   Boost  */
using namespace std;
int main() {
  std::vector<std::string> bunching_times;
	string specific_bunch_times_ = "12:00:00, , ,   13:00:00,15:00:04";
 
  boost::split(bunching_times,
               specific_bunch_times_,
               boost::is_any_of(", ") 
              );
 
	for (auto itr: bunching_times)
	{
		cout << itr << " ";
	}
}
 

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