#include <fstream>
#include <iostream>

int main()
{
	std::ifstream file("input.txt");

	int joltage_sum = 0;

	std::string bank;
	while (getline(file, bank)) {
		int first_index;
		for (int i = 9; i > 0; i--) {
			char digit = i + 48;

			first_index = bank.find(digit);

			if (first_index != bank.size() - 1 && first_index != std::string::npos)
				break;
		}

		int second_index;
		for (int i = 9; i > 0; i--) {
			char digit = i + 48;

			second_index = bank.find(digit, first_index + 1);

			if (second_index != std::string::npos)
				break;
		}

		int joltage = std::stoi(std::string { bank[first_index], bank[second_index] });

		std::cout << joltage << std::endl;

		joltage_sum += joltage;
	}

	std::cout << "\nSum: " << joltage_sum << std::endl;
}