using System;
using System.Linq;

class Program
{
    public static void Main(string[] args)
    {
        int[] nums = Console.ReadLine().Split().Select(int.Parse).ToArray();
        int sum = 0;
        for (int i = 0; i < nums.Length; i++)
        {
            int currentNumber = nums[i];
            {
                if(currentNumber%2==0)
                {
                    sum += currentNumber;
                }
            }
        }
        Console.WriteLine("Sum = " + sum);

    }
}