Secret

using System;
using System.Numerics;

class Program
{
    static void Main()
    {
        string n = Console.ReadLine();
        if (n[0] == '-')
        {
            n = n.Remove(0, 1);
        }
        char[] charr = n.ToCharArray();
        Array.Reverse(charr);
        int specialSum = 0;
        for (int i = 0; i < charr.Length; i++)
        {
            if (i % 2 == 0)
            {
                specialSum = specialSum + (i + 1) * (i + 1) * (charr[i] - 48);
            }
            if (i % 2 == 1)
            {
                specialSum = specialSum + (i + 1) * (charr[i] - 48) * (charr[i] - 48);
            }
        }
        Console.WriteLine(specialSum);
        int alphaSequence = specialSum % 10;
        if (alphaSequence == 0)
        {
            Console.WriteLine(n + " has no secret alpha-sequence");
            return;
        }
        int r = specialSum % 26;
        char chr = (char)(r + 65);
        for (int i = 0; i < alphaSequence; i++)
        {
            Console.Write(chr);
            if (chr == 90)
            {
                chr = (char)64;
            }
            chr++;
        }
        Console.WriteLine();
    }
}