#include<bits/stdc++.h> 
using namespace std;
typedef long long ll;
const int N=20;
int month[N]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int main()
{
	ll st,ed,num=0;
	cin>>st>>ed;
	ll date=st,key=0,y=st/1000;
	while(1)
	{
		for(int i=1;i<=12;i++)
		{
			for(int j=1;j<=month[i];j++)
			{
				date=y*1000+i*100+j;
				int flag=0;
				if((y/1000==j%10)&&(y/100%10==j/10)&&(y/10%10==i%10)&&(y%10==i/10))
				flag=1;
				if(date>=st&&date<=ed&&flag)
				 num++;
				if(date>ed)
				 key=1;
			}
		}
		y++;
		if(key)
		break;
	}
	cout<<num;
	return 0;
}