#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long int a, b;     cin >> a >> b;     a--;     string l = to_string(a);     string r = to_string(b);     long long int ans1;     if (l.length() == 1) {       ans1 = a;     } else {       if (l[0] <= l[(l.length() - 1)]) {         ans1 = (a / 10) + 9;       } else {         ans1 = (a / 10) + 8;       }     }     long long int ans2;     if (r.length() == 1) {       ans2 = b;     } else {       if (r[0] <= r[(r.length() - 1)]) {         ans2 = (b / 10) + 9;       } else {         ans2 = (b / 10) + 8;       }     }     cout << ans2 - ans1 << endl;     return 0;   }   