#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll solve(ll x)
{
if (x == 0)
{
return 0;
}
if (x < 100)
{
ll res = 1;
for (int i = 1; i < x; i++) if (i / 10 != i % 10)
{
res++;
}
return res;
}
ll res = 91;
string s = to_string(x);
for (int d = 3; d < s.size(); d++)
{
ll a = 81;
for (int i = 0; i < d - 2; i++)
{
a *= 8;
}
res += a;
}
ll m = 9;
for (int i = 2; i < s.size(); i++)
{
m *= 8;
}
res += m * (s[0] - '0' - 1);
//cout <<m * (s[0] - '0' - 1)<<endl;
for (char d = '0'; d < s[1]; d++) if (d != s[0])
{
ll a = 1;
for (int i = 2; i < s.size(); i++)
{
a *= 8;
}
res += a;
}
if (s[0] == s[1]) return res;
for (int i = 2; i < s.size(); i++)
{
for (char d = '0'; d < s[i]; d++) if (d != s[i - 1] && d != s[i - 2])
{
ll a = 1;
for (int j = i + 1; j < s.size(); j++)
{
a *= 8;
}
res += a;
}
if (s[i] == s[i - 1] || s[i] == s[i - 2]) return res;
}
return res;
}
int main()
{
cin.tie(0);
cout.tie(0);
ios::sync_with_stdio(0);
ll a, b;
cin >> a >> b;
cout << solve(b + 1) - solve(a) << "\n";
return 0;
}
