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#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int b[N], bl;
bool check(int x) {
bl = 0;
// 1、转九进制
while (x) {
int a = x % 9;
// 2、检查在九进制情况下，每个数位是不是奇数
if (a % 2 == 0) return false;
b[++bl] = a; // 将每个数位增加到b数组中
x /= 9;
}
// 3、检查在九进制情况下，是不是回文数
for (int i = 1, j = bl; i <= j; i++, j--)
if (b[i] != b[j]) return false;
return true;
int main() {
int n, m, cnt = 0;
cin >> n >> m;
for (int i = n; i <= m; i++)
if (check(i)) cnt++;
cout << cnt << endl;
return 0;
