#include<bits/stdc++.h>
using namespace std;
int x,l;
int w[1000]={10, 102, 120, 201,210,1023,1032,1203,1230,1302,1320,2013,2031,2103,2130,2301,2310,3012,3021,3102,3120,3201,3210};
int main(){
	int a,b;
	cin>>a>>b;
	int cnt=0;
	for(int i=a;i<=b;i++){
		for(int j=0;j<b;j++){
			if(i==w[j]){
				cnt++;
			}
		}
	}
	cout<<cnt;
	return 0; 
}