import java.util.Scanner;

class Main{

	public static void main(String[] args) {




		Scanner scan = new Scanner(System.in);
		String A =scan.next();
		String B =scan.next();

		int numA = Integer.parseInt(A);
		int numB = Integer.parseInt(B);

		int ans = 0;

		for(int i = numA;i <= numB;i++){
			String x = String.valueOf(i);
			if(x.charAt(1) == x.charAt(3) && x.charAt(0) == x.charAt(4)  ){
				ans++;

			}
		}
		System.out.println(ans);




	}


}

/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