Secrets

using System;


class Program
{
    static void Main(string[] args)
    {

        string num = Console.ReadLine();

        string reversed = "0";


        for (int i = num.Length - 1; i >= 0; i--)
        {

            reversed += num[i];

        }



        int secretSum = 0;
        for (int i = 1; i < reversed.Length; i++)
        {

            int number = int.Parse(reversed[i].ToString());

            if (i % 2 != 0)
            {
                secretSum += number * i * i;
            }

            if (i % 2 == 0)
            {
                secretSum += number * number * i;
            }




        }

        //MAKING THE ENGLISH ALPHABET

        char[] alphabet = new char[53];
        char ch = 'A';
        for (int i = 1; i < 27; i++)
        {

            alphabet[i] = ch;
            ch++;

        }

        ch = 'A';
        for (int i = 27; i < 53; i++)
        {
            alphabet[i] = ch;
            ch++;


        }


        //MAKING THE SECRET ALPHA-SEQUENCE

        int R = secretSum % 26;
        int alphaLenghtSequence = secretSum % 10;

        if (alphaLenghtSequence == 0)
        {

            Console.WriteLine(secretSum);
            Console.WriteLine("{0} has no secret alpha-sequence", num);


        }
        else
        {
            Console.WriteLine(secretSum);
            for (int i = R + 1; i < alphaLenghtSequence + R + 1; i++)
            {

                Console.Write(alphabet[i]);
                if (i + 1 >= alphaLenghtSequence + R + 1) {
                    Console.WriteLine();
                    break;


                }

            }

        }

    }
}