6

#include <bits/stdc++.h>
using namespace std;

int main() {
	int n, m, ans = 0;
	cin >> n >> m;
	for (int i = n; i <= m; i++) {
		int t = i, flag = 1;
		while (t > 0) {
			int r = t % 10;
			if (r == 0) {
				flag = 0;
			} else {
				if (i % r != 0) {
					flag = 0;
				}
			}
			t /= 10;
		}
		if (flag) {
			ans++;
		}
	}
	cout << ans;
	return 0;
}