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

int a[1000005];

int main()
{
	int a, b, jsq = 0, len, jwq, t, w;
	cin >> a >> b;
	string s;
	for (int i = a; i <= b; i++)
	{
		t = i;
		w = 0;
		while (t)
		{
			s[w] += t % 10;
			t /= 10;
			w++;
		}
		len = s.size();
		sort (s, s + len);
		for (int j = 0; j < len; j++)
		{
			if (s[j] == j - '0') jwq++;
		}
		if (jwq == len) jsq++;
		s = "";
	}
	cout << jsq;
	return 0;
}