#include <iostream>
    #include <sstream>
    #include <string>
    using namespace std;

    int main() {

	    istringstream iss("1 a 1 b 4 a 4 b 9");
		cin.rdbuf(iss.rdbuf());
		int num = 0;
        char c;
		while(cin >> num >> c || !cin.eof()) {
			if(cin.fail()) {
				cin.clear();
				string dummy;
				cin >> dummy;
				continue;
			}
			cout << num << ", " << c << endl;
		}
		return 0;
	}