#include<bits/stdc++.h>
using namespace std;
long long day[12]={31,29,31,30,31,30,31,31,30,31,30,31};
int main(){
	long long r,m,ans;
	cin>>r>>m;
	for (int i=1;i<=12;i++)
	{
		for (int w=1;w<=day[i];w++)
		{
			int j=(w%10)*1000+(w/10)*100+(r%10)*10+r/10;
			int date=j*10000+r*100+w;
			ans +=(date>=r&&date<=m);
		}
	}
	cout<<ans<<endl;
	return 0;
}

dalao求解QwQ