import java.util.*;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int count = 0;
    for (int num = a; num <= b; num++) {
      if (isPalindromicNumbers(num)) count++;
    }
    System.out.println(count);
  }
  public static boolean isPalindromicNumbers(int num) {
    String strNum = Integer.toString(num);
    for (int i = 0; i < strNum.length() / 2; i++) {
      if (strNum.charAt(i) != strNum.charAt(strNum.length() - i - 1)) return false;
    }
    return true;
  }
}
/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