#include<bits/stdc++.h>
using namespace std;
int help(int t)
{
	int h=0,d=t;
	while(d>0)
	{
		h=h*10+d%10;
		d/=10;
	}
	return h;
}
int main()
{
	int a,b,ans=0;
	cin>>a>>b;
	for(int i=a;i<=b;i++)
	{
		if(i==help(i))
			ans++;
	}
	cout<<ans;
	return 0;
}