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();
                sc.close();
                int yono = 0;
                for(int i = a ; i <= b ; i++){
                        int aa = i / 10000;
                        int bb = (i / 1000) % 10;
                        int dd = (i/ 10) % 10;
                        int ee = i % 10;
                        if(aa == ee && bb == dd)yono++;
                }
                System.out.println(yono);
        }
}
//鶏になれ
/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