import java.util.Scanner;

public class Main {

    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);
        int count = 0;
        int lower = sc.nextInt();
        int upper = sc.nextInt();
        for (int num = lower; num <= upper; num++) {
            if (String.valueOf(num).equals(new StringBuilder(String.valueOf(num)).reverse().toString())) {
                count++;
            }
        }
        System.out.println(count);
    }
    
}

/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