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

#define STRINGTONUM(test, number) \
	if(str == test) { \
		digit = number; \
	} else \

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

	std::regex numberRegex("(zero|one|two|three|four|five|six|seven|eight|nine|[0-9])");

	size_t val = 0;
	for(std::string line; std::getline(input, line);) {
		std::vector<uint8_t> digits;
		std::for_each(std::sregex_iterator(line.begin(), line.end(), numberRegex), std::sregex_iterator(), [&digits](const std::smatch &match){
			std::string str = match.str();
			uint8_t digit;
			if(str.size() > 1) { // not a direct digit
				STRINGTONUM("zero", 0)
				STRINGTONUM("one", 1)
				STRINGTONUM("two", 2)
				STRINGTONUM("three", 3)
				STRINGTONUM("four", 4)
				STRINGTONUM("five", 5)
				STRINGTONUM("six", 6)
				STRINGTONUM("seven", 7)
				STRINGTONUM("eight", 8)
				STRINGTONUM("nine", 9) {}
			} else {
				digit = str[0] - '0';
			}
			digits.push_back(digit);
		});
		val += digits.front()*10 + digits.back();
	}
	std::cout << val << std::endl;
}