#include <cstdio>
#include <string>
#include <algorithm>

int year,month,day,eyear,emonth,eday,ans = 0;

bool runnian(){
    
    if (year % 4 == 0){
        
        if (year % 100 == 0 && !(year % 400 == 0)) return 0;
        return 1;
        
    }
    return 0;
    
}

int max(int x){
    
    if (x == 2) return runnian() ? 29 : 28;
    if (x < 7) return x % 2 ? 31 : 30;
    if (x == 7 || x == 8) return 31;
    return x % 2 ? 30 : 31;
    
}

bool earlier(){
    
    if (year != eyear) return year < eyear;
    if (month != emonth) return month < emonth;
    return day <= eday;
    
}

bool huiwen(){
    
    char s[100];
    std::string str,str2;
    
    sprintf(s,"%04d%02d%02d",year,month,day);
    str2 = str = s;
    std::reverse(str.begin(),str.end());
    
    return str2 == str;
}

void update(){
    
    day++;
    if (day > max(day)) day %= max(day),month++;
    if (month > 12) month %= 12,year++;
    
}

int main(){
    
    scanf("%4d%2d%2d",&year,&month,&day);
    scanf("%4d%2d%2d",&eyear,&emonth,&eday);
    while (earlier())
        huiwen() && ans++,update();
    printf("%d\n",ans);
    
    return 0;
}