#include<bits/stdc++.h>
using namespace std;
int f(int n) 
{  
    int sum=0;  
    while (n) 
	{  
        sum+=n%10;  
        n/=10;  
    }  
    return sum;  
}  
  
int fi(int a,int b) 
{  
    int c=0;  
    for (int i=a;i<=b;i++) 
	{  
        if (i%f(i)==0) 
		{  
            c++;  
        }  
    }  
    return c;  
}  
  
int main() 
{  
    int a,b;  
    cin>>a>>b;  
    int c=0;
	c=fi(a,b);  
    cout<<c<<endl;  
    return 0;  
}