using System;

class Program
{
    static void Main(string[] args)
    {
        int firstNumber = int.Parse(Console.ReadLine());
        int secondNumber = int.Parse(Console.ReadLine());

        string firstNumberInString = firstNumber.ToString();
        string secondNumberInString = secondNumber.ToString();

        int oddSum = 0;
        int evenSum = 0;
        string combination = string.Empty;

        for (int i = firstNumber; i <= secondNumber; i++)
        {
            for (int digitIndex = 0; digitIndex < firstNumberInString.Length; digitIndex++)
            {
                string digit = firstNumberInString[digitIndex].ToString();
                int digitInInteger = int.Parse(digit);
                if (digitInInteger % 2 == 0)
                {
                    evenSum += digitInInteger;
                }
                else
                {
                    oddSum += digitInInteger;
                }
                combination += digit;
                if (evenSum != oddSum)
                {
                    combination = string.Empty;
                    continue;
                }
                else
                {
                    Console.Write($"{combination }");
                }
            }
        }
    }
}