using System;

namespace MultiplyEvensByOdds
{
    class Program
    {
        static void Main(string[] args, int result)
        {
            int number = int.Parse(Console.ReadLine());
            number = Math.Abs(number);

            CalculateSums(number);
            Console.WriteLine(MultiplySums());
        }


        static void CalculateSums(int pNumber)
        {
            int oddSum = 0;
            int evenSum = 0;

            while (pNumber > 0)
            {
                int digit = pNumber % 10;
                pNumber /= 10;

                if (digit % 2 == 0)
                {
                    evenSum += digit;
                }

                else
                {
                    oddSum += digit;
                }
            }

            MultiplySums(oddSum, evenSum);
        }


        static int MultiplySums(int pOddSum, int pEvenSum)
        {
            return pOddSum * pEvenSum;
        }
    }
}