
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a=sc.nextInt(),b=sc.nextInt();
        int ans=0;
        for(int i=a;i<=b;i++){
            if(iskaibun(i))ans++;
        }
        System.out.println(ans);
    }
    static boolean iskaibun(int in){
        String s=Integer.toString(in);
        boolean output=true;
        for(int i=0;i<s.length()/2;i++){
            output&=s.charAt(i)==s.charAt(s.length()-i-1);
        }
        return output;
    }
}

/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