#include<fstream>
using namespace std;
int main()
{
		ifstream fcin("peluzanord.in");
		ofstream fcout("peluzanord.out");
		long long a,b,i,p=0,p2,t,s=0;
		fcin>>a>>b;
		p2=a;
		while(p2!=0){p=p+p2%10;p2=p2/10;}
		for(i=a;i<=b;i++)
				{if(i%p==0)s++;
				 p++;t=i;
				 while(t%9==0&&t>0){p=p-9;t=t/10;}
				}
		fcout<<s<<'\n';
		return 0;
}