#include<bits/stdc++.h>
using namespace std;
int a[10000]={10,102,120,201,210,1023,1032,1203,1230,1302,1320,2013,2031,2103,2130,2301,2310,3012,3021,3102,3120,3201,3210,10234,10243,10324,10342,10423,10432,12034,12043,12304,12340,12403,12430,13024,13042,13204,13240,13402,13420,14023,14032,14203,14230,14302,14320,20134,20143,20314,20341,20413,20431,21034,21043,21304,21340,21403,21430,23014,23041,23104,23140,23401,23410,24013,24031,24103,24130,24301,24310,30124,30142,30214,30241,30412,30421,31024,31042,31204,31240,31402,31420,32014,32041,32104,32140,32401,32410,34012,34021,34102,34120,34201,34210,40123,40132,40213,40231,40312,40321,41023,41032,41203,41230,41302,41320,42013,42031,42103,42130,42301,42310,43012,43021,43102,43120,43201,43210,102345,102354,102435,102453,102534,102543,103245,103254,103425,103452,103524,103542,104235,104253,104325,104352,104523,104532,105234,105243,105324,105342,105423,105432,120345,120354,120435,120453,120534,120543,123045,123054,123405,123450,123504,123540,124035,124053,124305,124350,124503,124530,125034,125043,125304,125340,125403,125430,130245,130254,130425,130452,130524,130542,132045,132054,132405,132450,132504,132540,134025,134052,134205,134250,134502,134520,135024,135042,135204,135240,135402,135420,140235,140253,140325,140352,140523,140532,142035,142053,142305,142350,142503,142530,143025,143052,143205,143250,143502,143520,145023,145032,145203,145230,145302,145320,150234,150243,150324,150342,150423,150432,152034,152043,152304,152340,152403,152430,153024,153042,153204,153240,153402,153420,154023,154032,154203,154230,154302,154320,201345,201354,201435,201453,201534,201543,203145,203154,203415,203451,203514,203541,204135,204153,204315,204351,204513,204531,205134,205143,205314,205341,205413,205431,210345,210354,210435,210453,210534,210543,213045,213054,213405,213450,213504,213540,214035,214053,214305,214350,214503,214530,215034,215043,215304,215340,215403,215430,230145,230154,230415,230451,230514,230541,231045,231054,231405,231450,231504,231540,234015,234051,234105,234150,234501,234510,235014,235041,235104,235140,235401,235410,240135,240153,240315,240351,240513,240531,241035,241053,241305,241350,241503,241530,243015,243051,243105,243150,243501,243510,245013,245031,245103,245130,245301,245310,250134,250143,250314,250341,250413,250431,251034,251043,251304,251340,251403,251430,253014,253041,253104,253140,253401,253410,254013,254031,254103,254130,254301,254310,301245,301254,301425,301452,301524,301542,302145,302154,302415,302451,302514,302541,304125,304152,304215,304251,304512,304521,305124,305142,305214,305241,305412,305421,310245,310254,310425,310452,310524,310542,312045,312054,312405,312450,312504,312540,314025,314052,314205,314250,314502,314520,315024,315042,315204,315240,315402,315420,320145,320154,320415,320451,320514,320541,321045,321054,321405,321450,321504,321540,324015,324051,324105,324150,324501,324510,325014,325041,325104,325140,325401,325410,340125,340152,340215,340251,340512,340521,341025,341052,341205,341250,341502,341520,342015,342051,342105,342150,342501,342510,345012,345021,345102,345120,345201,345210,350124,350142,350214,350241,350412,350421,351024,351042,351204,351240,351402,351420,352014,352041,352104,352140,352401,352410,354012,354021,354102,354120,354201,354210,401235,401253,401325,401352,401523,401532,402135,402153,402315,402351,402513,402531,403125,403152,403215,403251,403512,403521,405123,405132,405213,405231,405312,405321,410235,410253,410325,410352,410523,410532,412035,412053,412305,412350,412503,412530,413025,413052,413205,413250,413502,413520,415023,415032,415203,415230,415302,415320,420135,420153,420315,420351,420513,420531,421035,421053,421305,421350,421503,421530,423015,423051,423105,423150,423501,423510,425013,425031,425103,425130,425301,425310,430125,430152,430215,430251,430512,430521,431025,431052,431205,431250,431502,431520,432015,432051,432105,432150,432501,432510,435012,435021,435102,435120,435201,435210,450123,450132,450213,450231,450312,450321,451023,451032,451203,451230,451302,451320,452013,452031,452103,452130,452301,452310,453012,453021,453102,453120,453201,453210,501234,501243,501324,501342,501423,501432,502134,502143,502314,502341,502413,502431,503124,503142,503214,503241,503412,503421,504123,504132,504213,504231,504312,504321,510234,510243,510324,510342,510423,510432,512034,512043,512304,512340,512403,512430,513024,513042,513204,513240,513402,513420,514023,514032,514203,514230,514302,514320,520134,520143,520314,520341,520413,520431,521034,521043,521304,521340,521403,521430,523014,523041,523104,523140,523401,523410,524013,524031,524103,524130,524301,524310,530124,530142,530214,530241,530412,530421,531024,531042,531204,531240,531402,531420,532014,532041,532104,532140,532401,532410,534012,534021,534102,534120,534201,534210,540123,540132,540213,540231,540312,540321,541023,541032,541203,541230,541302,541320,542013,542031,542103,542130,542301,542310,543012,543021,543102,543120,543201,543210};
int main(){
	int n,b,cnt=0;
	cin>>n>>b;
	for(int i=0;i<10000;i++){
		if(a[i]>=n&&a[i]<=b){
			cnt++;
		}
	}
	cout<<cnt;
	return 0;
}