#include<bits/stdc++.h>
#define maxn 100 

using namespace std;

string to_String(int n)
{
    int m = n;
    char s[maxn];
    char ss[maxn];
    int i=0,j=0;
    if (n < 0)// 处理负数
    {
        m = 0 - m;
        j = 1;
        ss[0] = '-';
    }    
    while (m>0)
    {
        s[i++] = m % 10 + '0';
        m /= 10;
    }
    s[i] = '\0';
    i = i - 1;
    while (i >= 0)
    {
        ss[j++] = s[i--];
    }    
    ss[j] = '\0';    
    return ss;
}

int main()
{
	
	long long a,b;
	cin>>a>>b;
	long long ans=0;
	string a1=to_String(a),b1=to_String(b);
	for(int i=a;i<=b;i++)
	{
		string s=to_String(i);
		string s1=s;
		reverse(s.begin(),s.end());
		if(s==s1)
			ans++;
	}
	cout<<ans<<endl;
	return 0;
}