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 answer =0;
    for(int i=A;i<=B;i++){
      if(isParin(i)){
        answer++;
      }
    }
    System.out.println(answer);
  }
  
  public static boolean isParin(int n){
    boolean res=false;
    if(n/10000==n%10&&(n/1000)%10==(n/10)%10){
      return true;
    }
    return res;
  }
  

  
}
/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