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 ans = 0;
    for (int i = A; i <= B; i++) {
      if (check(i)) ans++;
    }
    System.out.println(ans);
  }
  
  private static boolean check(int num) {
    String s = String.valueOf(num);
    for (int i = 0; i < s.length(); i++) {
      if (s.charAt(i) != s.charAt(s.length() - 1 - i)) {
        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