import java.util.*;

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 i = a; i <= b; i++) {
      int[] array = new int[5];
      array[0] = i % 10;
      array[1] = i / 10 % 10;
      array[2] = i / 100 % 10;
      array[3] = i / 1000 % 10;
      array[4] = i / 10000 % 10;
      if (array[0] == array[4] && array[1] == array[3]) {
        count++;
      }
    }
    System.out.println(count);
  }
}
/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