#include<bits/stdc++.h>

using namespace std;

int i,j,n,m;

int a,b,c;

int num,cnt;

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++) 
        for(j=1;j<=s[i];j++){
            c=( j % 10 )* 1000+( j / 10 )* 100+( i % 10 ) * 10 + ( i / 10 );
            num = c * 10000 + i * 100 + j;
            if ( num<n||num>m ) continue;
            cnt++;
        }
    printf(" % d",cnt);
    return 0;
}