#include<bits/stdc++.h>
using namespace std;
int a,b,ans,k[120]={0,10,102,120,201,210,1023,1032,1203,1230,1302,1320,2013,2031,2103,2130,2301,2310,3012,3021,3102,3120,3201,3210,10234,10243,10324,10342,10423,10432,12034,12043,12304,12340,12403,12430,13024,13042,13204,13240,13402,13420,14023,14032,14203,14230,14302,14320,20134,20143,20314,20341,20413,20431,21034,21043,21304,21340,21403,21430,23014,23041,23104,23140,23401,23410,24013,24031,24103,24130,24301,24310,30124,30142,30214,30241,30412,30421,31024,31042,31204,31240,31402,31420,32014,32041,32104,32140,32401,32410,34012,34021,34102,34120,34201,34210,40123,40132,40213,40231,40312,40321,41023,41032,41203,41230,41302,41320,42013,42031,42103,42130,42301,42310,43012,43021,43102,43120,43201,43210};
int main(){
	cin>>a>>b;
	for(int i=1;i<=119;i++){
		if(k[i]>=a&&k[i]<=b) ans++;
		if(k[i]>b) break;
	}
	cout<<ans;
}