Untitled

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Treta_zadacha
{
    internal class Program
    {
        static void Main(string[] args)
        {
            List<int> nums = Console.ReadLine().Split(',').Select(int.Parse).ToList();
            for (int i = 0; i < nums.Count; i++)
            {
                if (nums[i] % 2 == 0)
                    Console.Write(nums[i]);
            }
            Console.WriteLine();
        }
    }
}