#include <fstream>
#include <iostream>
#include <algorithm>
#include <sstream>
 
int main()
{
    // std::ifstream ifstr("YourFile.txt");
    // std::istream & istr = ifstr;
    
    std::istream & istr = std::cin;
    
    std::vector<std::pair<double, double>> vec;
    
	
	std::string line;
	
	while ( std::getline(istr, line) )
	{
		if ( line == "undef, undef" )
			continue;
			
		std::stringstream ss(line);
	
		double a, b;
		char comma;
		
		while ( ss >> a >> comma >> b )
		{
			if ( comma == ',' )
				vec.emplace_back(a, b);
		}
	}
    
    std::for_each(std::begin(vec), std::end(vec), [](std::pair<double, double> const& x){ std::cout << x.first << " -> " << x.second << std::endl;});
    
    return 0;
}