#include<bits/stdc++.h>
using namespace std;
int a[720]={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, 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 x, b;
	cin >> x >> b;
	cout << upper_bound(a+1, a+721, b)-lower_bound(a+1, a+721, x) << endl;
	return 0;
}