#include<bits/stdc++.h>
#define long long ll
using namespace std;
int n,m;
string s[15]={"0","01","012","0123","01234","012345","0123456","01234567"};
bool judge(int n)
{
	string r="";
	while(n!=0)
	{
		char c=n%10+'0';
		r=c+r;
		n/=10;
	}
	sort(r.begin(),r.end());
	int len=r.size();
	int i=r[len-1]-'0';
	if(s[i]==r)  return 1;
	else return 0;
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>m;
	int cnt=0;
	for(int i=n;i<=m;i++)
		cnt+=judge(i);
	cout<<cnt<<endl;
	return 0;
}