using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

class Program
{
    static void Main(string[] args)
    {
        var a = Console.ReadLine().Split().Select(int.Parse);
        int ans = 0;
        foreach (var item in a)
        {
            if (item % 15 == 0)
            {
                ans += 8;
            }
            else if (item % 5 == 0)
            {
                ans += 4;
            }
            else if (item % 3 == 0)
            {
                ans += 4;
            }
            else
            {
                ans += (int)Math.Log(item, 10) + 1;
            }
        }
        Console.WriteLine(ans);
    }
}