import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int m = Integer.parseInt(sc.next());
		int d = Integer.parseInt(sc.next());
		int count=0,buff1,buff2;

		for(int i=4;i<=m;i++) {
			for(int j=1;j<=d;j++) {
				buff1 = j%10;
				buff2 = j/10;
				//System.out.println(buff1 +" "+buff2);
				if(buff1!=1 && buff2!=1) {
					if(i == buff1*buff2) {
						count++;
					}
				}

			}
		}
		System.out.println(6-m-d);


	}

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz