#include<iostream>
using namespace std;
int main()
{long long br=0,pc,sum=0,sum1=0,p1,a,b,p;
cin>>a>>b;
if(a%9==0) p=a;
else if(a%9==1) p=a+8;
else if(a%9==2) p=a+7;
else if(a%9==3) p=a+6;
else if(a%9==4) p=a+5;
else if(a%9==5) p=a+4;
else if(a%9==6) p=a+3;
else if(a%9==7) p=a+2;
else if(a%9==8) p=a+1;
for(p=p;p<=b;p=p+9)
{pc=p;
while(pc)
{sum=sum+(pc%10);
pc=pc/10;
}
p1=p*9;
while(p1)
{sum1=sum1+(p1%10);
p1=p1/10;
}
if(sum==sum1) br++;
sum=0;
sum1=0;
}
cout<<br<<endl;
return 0;
}