using System;
using System.Linq;

namespace _05._Good_numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            int[] numbers = input
                .Split()
                .Select(int.Parse)
                .ToArray();
            int firstNumber = numbers[0];
            int lastNummber = numbers[1];
            int counter = 0;
            bool isValid = true;
            for (int i = firstNumber; i <= lastNummber; i++)
            {
                int currentNum = i;
                while (currentNum>0)
                {
                    int digit = currentNum % 10;

                    if (digit==0 || currentNum % digit == 0)
                    {
                        currentNum /= 10;
                        continue;
                    }
                    else
                    {
                        isValid = false;
                        break;
                    }
                }
                if (isValid)
                {
                    counter++;
                }
                else
                {
                    continue;
                }
            }
            Console.WriteLine(counter);
        }
    }
}