#include <string>
#include <regex>
#include <iostream>
using namespace std;
 
int main() {
   std::string s{ "AAPL  150918C00099500" };
   std::regex pat{ R"(([a-zA-Z0-9]{1,6})\s*(\d{6})([CP]{1})(\d{8}))" };
   bool isMatch = std::regex_match( s, pat );
   std::sregex_iterator it( s.begin(), s.end(), pat );
   for( ; it != std::sregex_iterator{}; ++it )
   {
      std::cout << ( *it )[1] << "\n" << ( *it )[2]<< "\n" << ( *it )[3] << "\n" << ( *it )[4] << std::endl;
   }
    return 0;
}

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