using System;

​

public class Program

{

    public static void Main()

    {

        int sum = 0;

        string name = (Console.ReadLine());

        char[] letter = name.ToCharArray();

        for (int i = 0; i < letter.Length; i++)

        {

            if(letter[i] == 'a'){

                sum++;

            }

            if(letter[i] == 'e'){

                sum +=2;

            }

            if(letter[i] == 'i'){

                sum +=3;

            }

            if(letter[i] == 'o'){

                sum +=4;

            }

        }

        Console.WriteLine(sum);

    }

}