using namespace std;
int month[15]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int x,y;
int main()
{
	int sum=0;
	scanf("%d%d",&x,&y);
	for(int i=1;i<=12;i++)
	{
		for(int j=1;j<=month[i];j++)
		{
			int k=(j%10)*1000+(j/10)*100+(i%10)*10+i/10;
			k=k*10000+i*100+j;
			if(k>=x&&k<=y)
			sum++;
		}
	}
	printf("%d\n",sum);
	return 0;
}
//https://www.bilibili.com/video/BV1iV4y1N7Az/?spm_id_from=333.337.search-card.all.click&vd_source=42c02d8f2977de812d87f471f8153d89