#include<bits/stdc++.h>
using namespace std;
int a,b,y,y2,m1,m2,d1,d2;
int strtonum(string x){
	if(x.size()==0)
	return 0;
	else
	{stringstream sstream(x);
	 int v;
	 sstream>>v;
	 return v;}
}
string to_string1(int num){
	stringstream sstream;
	string s;
	sstream<<num;
	if((num/100)<10)
	{
		sstream>>s;
		s.insert(0,"0");
	}
	else
	sstream>>s;
	return s;
}

int r(int x){
	return (x%4==0&&x%100!=0||x%400==0)?29:28;
	
}
bool ishui(int y,int m,int d){
	int c=y*10000+m*100+d;
    int g=c/10000;
    string e;
	e=to_string1(c%10000);	
    reverse(e.begin(),e.end());
    int f=strtonum(e);
    if(f==g)
    return true;
    else 
	{return false;}
}
int main(){	
int sum=0;
	cin>>a>>b;
	y=a/10000;
	m1=a%10000/100;
	d1=a%100;	
	y2=b/10000;
	m2=b%10000/100;
	d2=b%100;
	while(y<y2||y==y2&&m1<m2||y==y2&&m1==m2&&d1<d2){
		if(ishui(y,m1,d1))
		{sum++;}
		if(m1==12&&d1==31)
		{m1=1;d1=0;y++;}
        if(m1==2&&d1==r(m1)||((m1==1||m1==3||m1==5||m1==7||m1==8||m1==10)&&d1==31)||((m1==4||m1==6||m1==9||m1==11)&&d1==30))
           {
           	m1++;d1=0;
           } 
		   d1++; 
	}
	if(a==b)
	{if(sum>0)
	sum=1;
	else
	sum=0;
	}
	cout<<sum<<endl;
	return 0;
}