#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int a,b,sum; 
int main(){
	scanf("%d",&a);
	scanf("%d",&b);
	for(int i=a;i<=b;i++){
		int i2=i;
		string s="";
		while(i2){
			s+=(i2%10+'0');
			i2/=10;
		}
		if(s[s.size()-1]=='0')continue;
		sort(s.begin(),s.end());
		bool suc=1;
		for(int j=0;j<s.size();j++){
			if(s[j]-'0'!=j){
				suc=0;break;
			}
		}
		sum+=suc;
	}
	printf("%d",sum);
	return 0;
}