namespace CryptoCS
{
    using System;
    using System.Numerics;

    class Program
    {
        static void Main()
        {
            var firstNumber = DecryptToDec(26,'a');
            var operationSymbol = Console.ReadLine();
            var secondNumber = DecryptToDec(7,'0');
            var resultInDecimal = (operationSymbol == "+") ?
                firstNumber + secondNumber : firstNumber - secondNumber;

            EncryptTo9Base(resultInDecimal);
        }

        private static void EncryptTo9Base(BigInteger number)
        {
            string result = string.Empty;

            do
            {
                int digit = (int)(number % 9);
                result = digit + result;
                number /= 9;
            } while (number > 0);

            Console.WriteLine(result);
        }

        private static BigInteger DecryptToDec(int numberBase,char symbol)
        {
            var inputNumber = Console.ReadLine();
            BigInteger result = 0;

            foreach (char digit in inputNumber)
            {
                result = (digit - symbol) + (result * numberBase);
            }

            return result;
        }
    }

}