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

bool hw(long long a[1001]) {
	for (int i = 0; i <  8; i++) {
		if (a[i] != a[8 - 1 - i]) {
			return 0;
		}
	}
	return 1;
}

long long s[1001] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main() {
	long long c[1001];
	string  a, b, d;
	long long hhh, www, jjj, yyy, xxx, sss, ans = 0;
	cin >> a >> b;
	hhh = int(b[0] - '0') * 1000 + int(b[1] - '0') * 100 + int(b[2] - '0') * 10 + int(b[3] - '0');
	www = int(a[0] - '0') * 1000 + int(a[1] - '0') * 100 + int(a[2] - '0') * 10 + int(a[3] - '0');

	/*jjj=int(a[4]-'0')*10+int(a[5]-'0');
	yyy=int(b[4]-'0')*10+int(b[5]-'0');
	xxx=int(a[6]-'0')*10+int(a[7]-'0');
	sss=int(b[6]-'0')*10+int(b[7]-'0');*/
	for (long long i = www; i <= hhh; i++) {
		c[0] = i / 1000;
		c[1] = i % 1000 / 100;
		c[2] = i % 1000 % 100 / 10;
		c[3] = i % 10;
		c[7] = i / 1000;
		c[6] = i % 1000 / 100;
		c[5] = i % 1000 % 100 / 10;
		c[4] = i % 10;
	
		if (c[4] * 10 + c[5] <= 12 && c[4] * 10 + c[5] >= 1) {
			if (c[6] * 10 + c[7] <= s[c[6]  * 10 + c[7]]
			        && c[6]  * 10 + c[7] >= 1) {
				if (hw(c)) {
					ans++;
				}
			}
		}
	}
	cout << ans;
	return 0;
}