Today is August 24, one of the five Product Days in a year.

A date m-d (m is the month, d is the date) is called a Product Day when d is a two-digit number, and all of the following conditions are satisfied (here d_{10} is the tens digit of the day and d_1 is the ones digit of the day):

* d_1 \geq 2
* d_{10} \geq 2
* d_1 \times d_{10} = m



Takahashi wants more Product Days, and he made a new calendar called Takahashi Calendar where a year consists of M month from Month 1 to Month M, and each month consists of D days from Day 1 to Day D.

In Takahashi Calendar, how many Product Days does a year have?

Constraints

* All values in input are integers.
* 1 \leq M \leq 100
* 1 \leq D \leq 99

Input

Input is given from Standard Input in the following format:


M D


Output

Print the number of Product Days in a year in Takahashi Calender.

Examples

Input

15 40


Output

10


Input

12 31


Output

5


Input

1 1


Output

0
import java.util.*;
public class Main {
	public static void main(String[] args){
	  Scanner sc = new Scanner(System.in);
      int month = sc.nextInt();
      int day = sc.nextInt();
      int count = 0;
      
      for (int i = 22; i <= day; i++) {
         String[] s = String.valueOf(i).split("");
         int day1 = Integer.parseInt(s[0]);
         int day2 = Integer.parseInt(s[1]);
         if (day1 >= 2 && day2 >= 2) {
            int ans = day1 * day2;
            for (int j = 1; j <= month; j++) {
               if (ans == j) {
                  count++;
               }
            }
         }
      }
      
      System.out.println(count);
	}
}