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 m=sc.nextInt();
    int d=sc.nextInt();
    sc.close();
    int d10=d/10;
    int d1=d%10;
    int cnt=0;
    if(d10>=2&&m>=4){
      for(int i=4;i<=m;i++){
        for(int j=2;j<d10;j++){//10の位で，d10未満分
          for(int k=2;k<10;k++){
            if(i==j*k){
              cnt++;
            }
          }
        }
        for(int k=2;k<=d1;k++){//１０の位がd10のとき
          if(i==d10*k){
            cnt++;
          }
        }
      }
    }
    System.out.println(cnt);
  }
}