
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
	    int a = scan.nextInt();
	    int b = scan.nextInt();
	    scan.close();
	    int cnt=0;
	    for(int i=a;i<=b;i++) {
	    	String s = String.valueOf(i) ;
	    	for(int j=0;j<s.length()/2;j++) {
	    		int x = Character.getNumericValue(s.charAt(j));
	    		int y = Character.getNumericValue(s.charAt(s.length()-1-j));
	    		if(x!=y)break;
	    		else if(j==s.length()/2-1)cnt++;

	    	}
	    }
	    System.out.println(cnt);
	}

}
/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