#include <iostream>
#include <vector>

void getDigits(std::vector<unsigned int> &digits, unsigned long number) {
	std::vector<unsigned int> backwards;

	do {
		backwards.push_back(number % 10);
		number = number / 10;
	} while (number > 0);

	for (int i = backwards.size() - 1; i >= 0; i--) {
		digits.push_back(backwards[i]);
	}
}

int main() {
	unsigned long number;

	while (std::cin >> number) {
		std::vector<unsigned int> digits;
		getDigits(digits, number);
		std::cout << digits[0];
		for (int i = 1; i < digits.size(); i++) {
			std::cout << ", " << digits[i];
		}
		std::cout << std::endl;
	}

	return 0;
}