#include<iostream>
using namespace std;
int main()
{
	int date1,date2;
	int year1,month1,day1,sum_days=0,sum_1=0,a1;
	int i,j;
	cin>>date1>>date2;
	year1=date1/10000;
	month1=date1/100-year1*100;
	day1=date1-date1/100*100;
	i=date1,j=date2;
	while(i<j)
	{
		a1=i;
		while(a1)
		{
			sum_1=sum_1*10+a1%10;
			a1/=10;
		}
		if(sum_1==i)
		sum_days++;
		sum_1=0;
		if(year1%4==0&&year1%100!=0||year1%400==0)
		{
			if(month1==1||month1==3||month1==5||month1==7||month1==8||month1==10||month1==12)
			{
				if(month1==12)
				{
					if(day1==31)
					{
						year1++;
						month1=1;
						day1=1;
						i=i+10000-1100-30;
					}
					else
					{
						day1++;
						i++;
					}
				}
				else
				if(day1==31)
				{
					i=i-30+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
			if(month1==4||month1==6||month1==9||month1==11)
			{
				if(day1==30)
				{
					i=i-29+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
			if(month1==2)
			{
				if(day1==29)
				{
					i=i-28+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
		}
		else
		{
			if(month1==1||month1==3||month1==5||month1==7||month1==8||month1==10||month1==12)
			{
				if(month1==12)
				{
					if(day1==31)
					{
						year1++;
						month1=1;
						day1=1;
						i=i+10000-1100-30;
					}
					else
					{
						day1++;
						i++;
					}
				}
				else
				if(day1==31)
				{
					i=i-30+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
			if(month1==4||month1==6||month1==9||month1==11)
			{
				if(day1==30)
				{
					i=i-29+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
			if(month1==2)
			{
				if(day1==28)
				{
					i=i-27+100;
					day1=1;
					month1++;
				}
				else
				{
					day1++;
					i++;
				}
			}
		}
	}
	cout<<sum_days<<endl;
	return 0;
}