#include <bits/stdc++.h>
using namespace std;
/*
---===ASCII help===---
'0' -> 48 '9' -> 57
'A' -> 65 'Z' -> 90
'a' -> 97 'z' -> 122
*/
const long long mod = 1e9 + 7;
bool check(string s) {
for (long long i = 0; i < s.size(); i++) {
if (s[i] != s[s.size() - i - 1]) return false;
}
return true;
}
void solve() {
long long a, b, ans = 0;
cin >> a >> b;
for(long long k = a; k <= b; k++){
string s = to_string(k);
bool flag = true;
long long n = s.size();
for (long long i = 0; i < n; i++) {
if (flag) {
for (long long j = i + 1; j < n; j++) {
if (flag) {
string f = "";
for (long long q = i; q <= j; q++) f.push_back(s[q]);
if (check(f) && i != j) flag = false;
}
else break;
}
}
else break;
}
if (flag) ans++;
}
cout << ans << "\n";
}
int main() {
int t = 1;
//cin >> t;
while (t--) {
solve();
}
}
