#include <bits/stdc++.h>
using namespace std;
#define int long long
#define double long double
#define f first
#define s second
#define pb push_back
#define yes cout << "yes" << endl;
#define YES cout << "YES" << endl;
#define no cout << "no" << endl;
#define NO cout << "NO" << endl;
bool ispal(string s){
string h = s;
reverse(h.begin(), h.end());
bool ko = true;
for(int i = 0; i < s.size(); i++){
if(s[i] != h[i]) ko = false;
}
return ko;
}
void never_give_up() {
int n;
//cin >> n;
string l = "133";
if(ispal(l)){
//cout << "hee" << endl;
}
else{
//cout << "yook" << endl;
}
int a, b, c = 0, d = 0;
cin >> a >> b;
for(int k = a; k <= b; k++){
string s = to_string(k);
bool ok = true;
n = s.size();
for(int i = 0; i < n; i++){
if(ok){
for(int j = i + 1; j < n; j++){
if(ok){
string f = "";
for(int ha = i; ha <= j; ha++){
f = f + s[ha];
}
if(ispal(f) && i != j){
ok = false;
}
}
else{
break;
}
}
}
else{
break;
}
}
if(ok){
c++;
//cout << s << endl;
}
}
cout << c << endl;
}
void You_can_do_it() {
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int THE_wasd = 1;
//cin >> THE_wasd;
while(THE_wasd--){
never_give_up();
//You_can_do_it();
}
}
