#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
int s[50]={0,31,28,31,30,31,30,31,31,30,31,30,31};
long long a,b,t,h,c,sum;
using namespace std;
long long huiwen(int a1)
{
int k=0;
while(a1!=0)
{
k=k*10+a1%10;
a1/=10;
}
return k;
}
int main()
{
freopen("date.in","r",stdin);
freopen("date.out","w",stdout);
cin>>a>>b;
h=a/10000000*1000+a/1000000%10*100+a/100000%10*10+a/10000%10;
t=b/10000000*1000+b/1000000%10*100+b/100000%10*10+b/10000%10;
for(int i=h;i<=t;i++)
{
for(int j=1;j<=12;j++)
{
for(int k=1;k<=s[j];k++)
{
c=i*10000+j*100+k;
if(huiwen(c)==c) sum++;
}
}
}
cout<<sum;
fclose(stdin);
fclose(stdout);
return 0;
}