#include <fstream>
#include <iostream>
#include <algorithm>

int main()
{
	// std::ifstream ifstr("YourFile.txt");
	// std::istream & istr = ifstr;
	
	std::istream & istr = std::cin;
	
	std::vector<std::pair<double, double>> vec;
	
	double a, b;
	char comma;
	
	while ( istr >> 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;
}