#include <bits/stdc++.h>
using namespace std;

string to_base9(int x) {
    string s;
    if (x == 0) return "0";
    while (x > 0) {
        s += (x % 9) + '0';
        x /= 9;
    }
    reverse(s.begin(), s.end());
    return s;
}

int main() {
    int N, M;
    cin >> N >> M;
    int count = 0;
    for (int x = N; x <= M; ++x) {
        string s = to_base9(x);
        bool all_odd = true;
        for (char c : s) {
            if (c != '1' && c != '3' && c != '5' && c != '7') {
                all_odd = false;
                break;
            }
        }
        if (!all_odd) continue;
        if (s == string(s.rbegin(), s.rend())) {
            count++;
        }
    }
    cout << count << endl;
    return 0;
}