import java.util.*;

public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int A = Integer.parseInt(sc.next());
    int B = Integer.parseInt(sc.next());
    
    int ans = 0;
    for(int i = A; i <= B; i++){
      int n = i;
      int j =0 ;
      j += (n%10) * 10000;
      n /= 10;
      j += (n%10) * 1000;
      n /= 10;
      j += (n%10) * 100;
      n /= 10;
      j += (n%10) * 10;
      n /= 10;
      j += n%10;
      
      if(i == j){
        ans++;
      }
    }
    System.out.println(ans);
  }
}
/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