package A_tech_Java.methods_exr;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class demo {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(
                        System.in
                )
        );

        int num = Math.abs(Integer.parseInt(reader.readLine()));

        String numbers = num + "";
        int[] numbersNew = Arrays.stream(numbers.split("")).mapToInt(Integer::parseInt).toArray();
        int even = 0;
        int odd = 0;

        for (int i = 0; i < numbersNew.length; i++) {

            int result = numbersNew[i];

            if (result % 2 == 0 ) {
                even += result;
            }else {
                odd += result;
            }
        }

        System.out.println(even * odd);
    }
}