using System;

public class Hello
{
    public static void Main()
    {
        var s = Console.ReadLine().Trim();
        var sL = s.Length;
        var ans = 0;
        foreach (var x in s)
            if (x == '0' | x == '4' | x == '6' | x == '9') ans += 1;
            else if (x == '8') ans += 2;
        Console.WriteLine(ans + 1 + 2 * sL);
    }
}