#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define all(v) begin(v), end(v)
#define pi pair<int, int>
#define vi vector<int>
using namespace std;
ll dp[20][2][11][11];
string s;
ll f(int pos, bool lead, int a, int b, bool tight){
if(pos == s.size()) return 1;
if(!tight && dp[pos][lead][a][b]) return dp[pos][lead][a][b];
int lim = tight? (s[pos] - '0'):9;
ll res = 0;
for(int i = 0; i <= lim; i++){
bool nlead = lead;
int c = a, d = b;
if(!lead && i == 0){
nlead = false;
c = d = 10;
}
else{
if(!lead && d > 0){
nlead = true;
d = 10, c = i;
}
else{
if(a != 10 && a == i) continue;
if(b != 10 && b == i) continue;
d = a, c = i;
}
}
res += f(pos+1, nlead, c, d, tight && (i == lim));
}
if(!tight) dp[pos][lead][a][b] = res;
return res;
}
ll get(ll x){
s = to_string(x);
memset(dp, 0, sizeof(dp));
return f(0, 0, 10, 10, 1);
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0);
ll a, b; cin >> a >> b;
cout << get(b) - get(a-1);
return 0;
}
