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 numOfPalindromic = 0;

      for(; A<=B; A++) if ((A/10000 == A%10) && ((A/1000)%10 == (A/10)%10)) numOfPalindromic++;
      System.out.println(numOfPalindromic);
    }
}
/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