#include "bits/stdc++.h"
using namespace std;
bool pd(string s)
{
	string t=s;
	reverse(s.begin(),s.end());
	if(t==s) return true;
	return false;
}
int tomath(string s)
{
	int k=0;
	for(int i=0;i<s.size();i++)
	{
		k+=(s[i]-'0');
		if(i!=s.size()-1) k=k*10;
	}
	return k;
}
string tomorrow(string s)
{
	string d="",m="",y="";
	for(int i=6;i<=7;i++) d=d+s[i];
	for(int i=4;i<=5;i++) m+=s[i];
	for(int i=0;i<=3;i++) y+=s[i];
	int day=tomath(d),month=tomath(m),year=tomath(y);
	int da[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
	if(year%400==0 ||(year%4==0 && year%100!=0)) da[2]++;
	if(day==da[month]) 
	{
		day=1;
		if(month==12) 
		{
			month=1;
			year++;
		}
		else month++;
	}
	else day++;
	string g="";
	g=g+char(year/1000+int('0'));
	g=g+char(year/100%10+int('0'));
	g=g+char(year/10%10+int('0'));
	g=g+char(year%10+int('0'));
	g=g+char(month/10+int('0'));
	g=g+char(month%10+int('0'));
	g=g+char(day/10+int('0'));
	g=g+char(day%10+int('0'));
	return g;
}
int main()
{
	string left,right;
	int t=0;
	cin >> left >> right;
	if(pd(right)) t++;
	while(left!=right)
	{
		if(pd(left)) t++;
		left=tomorrow(left);
	}
	printf("%d",t);
	return 0;
}