#include<iostream> 
#include<cstdio>
#include<string>
#include<map>
#include<set>
#include<queue>
#include<vector> 
using namespace std;
int i,j,n,m,a,b,c,sum,ans;
int s[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int main()
{
    scanf("%d%d",&n,&m);
    for (i=1;i<=12;i++)//枚举月和日 
        for (j=1;j<=s[i];j++)
        {
            c=(j%10)*1000+
              (j/10)*100+
              (i%10)*10+
              (i/10);//算出前四位。
            sum=c*10000+i*100+j;//算出整个日期 
            if (sum<n||sum>m) continue;
            ans++;//统计 
        }
    printf("%d",ans);
    return 0;
}
/**************************************************************
	Problem: 1568
	User: admin
	Language: C++
	Result: Accepted
	Time:65 ms
	Memory:2076 kb
****************************************************************/