static void Main(string[] args)
        {
            string num1 = Console.ReadLine();
            string num2 = Console.ReadLine();
            Console.WriteLine(SumVeryBigNumbers(num1, num2));
        }
public static string SumVeryBigNumbers(string str1, string str2)
        {
            List<char> ch1 = str1.ToList();
            List<char> ch2 = str2.ToList();



            if (ch1.Count < ch2.Count)
            {
                int diff = ch2.Count - ch1.Count;
                for (int i = 0; i < diff; i++)
                {
                    ch1.Insert(0, '0');
                }
            }
            else if (ch2.Count < ch1.Count)
            {
                int diff = ch1.Count - ch2.Count;
                for (int i = 0; i < diff; i++)
                {
                    ch2.Insert(0, '0');
                }

            }
            return DoStringAddition(ch1,ch2);
        }

        public static string DoStringAddition(List<char> ch1, List<char> ch2)
        {

            StringBuilder sb = new StringBuilder();
            int sum = 0;
            for (int i = ch1.Count - 1; i >= 0; i--)
            {
                sum += int.Parse(ch1[i].ToString()) + int.Parse(ch2[i].ToString());
                if (sum < 10)
                {
                    sb.Append(sum);
                    sum = 0;
                }
                else
                {
                    sb.Append(sum % 10);
                    sum /= 10;
                    if (i == 0)
                    {
                        sb.Append(sum);
                    }
                }
            }
            for (int i = sb.Length - 1; i >= 0; i--)
            {
                if (!(sb[i].Equals('0')))
                {
                    break;
                }
                else
                    sb.Remove(i,1);
            }

            return ReverseString(sb.ToString());
        }
public static string ReverseString(string str)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = str.Length - 1; i >= 0; i--)
            {
                sb.Append(str[i]);
            }
            return sb.ToString();
        }