import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = sc.nextInt();
        int B = sc.nextInt();
        int cnt = 0;
        for (int i = 10000 ; i <= 99999 ; i++) {
            if (i >= A && i <= B) {
                int [] a = new int[5];
                int n = i;
                a[0] = n %10;
                n /= 10;
                a[1] = n %10;
                n /= 10;
                a[2] =n %10;
                n /= 10;
                a[3] = n %10;
                n /= 10;
                a[4] = n %10;
                if (a[0] == a[4] && a[1] == a[3]) {
                     cnt++;
                }
            }
        }
        System.out.println(cnt);
    }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz