using System;
using System.Linq;

namespace Arrays__More_Exercise
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = int.Parse(Console.ReadLine());

            int countVowel = 0;
            int countConsonant = 0;

            int[] array = new int[number];

            string name = Console.ReadLine();

            foreach (char charNumber in name)
            {

                if (charNumber == 'a' || charNumber == 'e' || charNumber == 'i' || charNumber == 'o' ||
                    charNumber == 'u' || charNumber == 'y' || charNumber == 'A' || charNumber == 'E' ||
                    charNumber == 'I' || charNumber == 'O' || charNumber == 'U' || charNumber == 'Y' )
                {

                    countVowel += charNumber;
                    countVowel *= name.Length;


                }
                else if (charNumber == 'b' || charNumber == 'c' || charNumber == 'd' || charNumber == 'f' ||
                         charNumber == 'g' || charNumber == 'h' || charNumber == 'j' || charNumber == 'k' ||
                         charNumber == 'l' || charNumber == 'm' || charNumber == 'n' || charNumber == 'p' ||
                         charNumber == 'q' || charNumber == 'r' || charNumber == 's' || charNumber == 't' ||
                         charNumber == 'v' || charNumber == 'w' || charNumber == 'z' || charNumber == 'B' ||
                         charNumber == 'C' || charNumber == 'D' || charNumber == 'F' ||
                         charNumber == 'G' || charNumber == 'H' || charNumber == 'J' || charNumber == 'K' ||
                         charNumber == 'L' || charNumber == 'M' || charNumber == 'N' || charNumber == 'P' ||
                         charNumber == 'Q' || charNumber == 'R' || charNumber == 'S' || charNumber == 'T' ||
                         charNumber == 'V' || charNumber == 'W' || charNumber == 'Z' )
                {

                    countConsonant += charNumber;
                    countConsonant /= name.Length;
                }

            }

            Console.WriteLine(countConsonant + countVowel);



        }
    }
}