AC

#include <bits/stdc++.h>
using namespace std;
string from,to;
int date[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int cnt;
bool Is_f(int y,int m,int d){
	date[1]=28;
	if(y%4==0&&y%400!=0) date[1]=29;
	if(m>=1&&m<=12&&d<=date[m-1]) return true;
	return false;
}
bool Is_w(int y,int m,int d){
	if(d%10!=y/1000) return false;
	d/=10;
	y%=1000;
	if(d%10!=y/100) return false;
	d/=10;
	y%=100;
	if(m%10!=y/10) return false;
	m/=10;
	y%=10;
	if(m!=y) return false;
	return true;
}
int main(){
	cin>>from>>to;
	int yf=1000*int(from[0]-'0')+100*int(from[1]-'0')+10*int(from[2]-'0')+int(from[3]-'0');
	int mf=10*int(from[4]-'0')+int(from[5]-'0');
	int df=10*int(from[6]-'0')+int(from[7]-'0');
	int yt=1000*int(to[0]-'0')+100*int(to[1]-'0')+10*int(to[2]-'0')+int(to[3]-'0');
	int mt=10*int(to[4]-'0')+int(to[5]-'0');
	int dt=10*int(to[6]-'0')+int(to[7]-'0');
	if(yf==yt&&mf==mt&&df==dt&&Is_f(yf,mf,df)&&Is_w(yf,mf,df)){
		cout<<1<<endl;
		return 0;
	}
	while(yf!=yt||mf!=mt||df!=dt){
		df++;
		if(df>date[mf-1]){
			df=1;
			mf++;
		}
		if(mf>12){
			mf=1;
			yf++;
		} 
		if(Is_f(yf,mf,df)&&Is_w(yf,mf,df)) cnt++;
		if(yf==yt&&mf==mt&&df==dt) break;
		
	}
	cout<<cnt<<endl;
	return 0;
}