#include<bits/stdc++.h>
using namespace std;
int dp[25][11]; // position, letter (0-9)
int dp_static[25][11];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
long long a, b;
cin >> a >> b;
vector<int> a_ve;
vector<int> b_ve;
while(a > 0){
a_ve.push_back(a%10);
a /= 10;
}
while(b > 0){
b_ve.push_back(b%10);
b /= 10;
}
reverse(a_ve.begin(), a_ve.end());
reverse(b_ve.begin(), b_ve.end());
for(int i = 0; i < 10; i++){
dp[1][i] = i;
}
for(int i = 2; i < 20; i++){
dp[i][0] = dp[i-1][9];
for(int j = 1; j < 10; j++){
dp_static[i][j] = dp[i][0] - dp_static[i-1][j] - dp_static[i-2][j];
dp[i][j] = dp[i][j-1] + dp_static[i][j];
}
}
int last = -1;
int last_second = -1;
int nr = a_ve.size() + 1;
int ans_a = 0;
for(auto u: a_ve){
nr--;
if(last == u or last_second == u){
break;
}
if(u == 0){
last_second = last;
last = u;
continue;
}
ans_a += dp[nr][u-1];
if(last != -1){
ans_a -= dp_static[nr-1][last];
}
if(last != -1 and last < u){
ans_a -= dp_static[nr][last];
}
if(last_second != -1 and last_second < u){
ans_a -= dp_static[nr][last_second];
}
last_second = last;
last = u;
}
last = -1;
last_second = -1;
nr = b_ve.size() + 1;
int ans_b = 0;
for(auto u: b_ve){
nr--;
if(last == u or last_second == u){
break;
}
if(u == 0){
last_second = last;
last = u;
continue;
}
ans_b += dp[nr][u-1];
if(last != -1){
ans_b -= dp_static[nr-1][last];
}
if(last != -1 and last < u){
ans_b -= dp_static[nr][last];
}
if(last_second != -1 and last_second < u){
ans_b -= dp_static[nr][last_second];
}
last_second = last;
last = u;
}
int ans = ans_b - ans_a;
cout << ans << '\n';
return 0;
}
