import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt();
		int B = sc.nextInt();
		int count =0;
		for (int i=A;i<=B;i++) {
			String temp = String.valueOf(i);
			boolean b = true;
			for (int j=0;j<2;j++) {
				if (temp.charAt(j)!=temp.charAt(temp.length()-j-1)) {
					b=false;
					break;
				}
			}
			if (b==true) {
				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