import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int A = sc.nextInt();
        int B = sc.nextInt();
        int counter = 0;

        for(int i = A; i <= B; i++){
            String str = String.valueOf(i);
            StringBuffer rstr = new StringBuffer(str);
            rstr.reverse();

            if(str.equals(rstr.toString())){
                counter++;
            }
        }


        System.out.println(counter);
    }
}
/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