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

string s; 
int a,b,l,ans; 
bool an;

signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	cin >> a >> b;
	for(int i = a;i <= b;i++){
		s = to_string(i);
		l = s.size();
		an = true;
		for(int j = 0;j <= l - 1;j++){
			if(s.find(to_string(j)) == string::npos){
				an = false;
				break;
			}
		}
		if(an == true){
			ans++;
		}
	}
	cout << ans << endl;
	return 0;
}