#include<bits/stdc++.h>

using namespace std;

int data1, data2, ans = 0, sum;
int d[13] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main()
{
    cin >> data1 >> data2;
    for (int i = 1; i <= 12; i++) {
        for (int j = 1; j <= d[i]; j++) {
            int c = (j % 10) * 1000 + (j / 10) * 100 + (i % 10) * 10 +
                    (i / 10);
            sum = c * 10000 + i * 100 + j;
            if (sum >= data1 && sum <= data2) ans ++;
        }
    }
    cout << ans;
    return 0;
}