import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Deque;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	}
} import java.io.File; File java.io import java.io.IOException; IOException java.io import java.util.ArrayDeque; ArrayDeque java.util import java.util.ArrayList; ArrayList java.util import java.util.Arrays; Arrays java.util import java.util.Collection; Collection java.util import java.util.Collections; Collections java.util import java.util.Comparator; Comparator java.util import java.util.Deque; Deque java.util import java.util.HashMap; HashMap java.util import java.util.List; List java.util import java.util.Scanner; Scanner java.util public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	}
} Main public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	} main {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc int B = sc.nextInt(); B sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		} int i = A; int i = A; i A i <= B i B i++ i++ i {
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		} {
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		} String s = String.valueOf(i); s String.valueOf(i) String.valueOf String i boolean tf = true; tf true for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			} int j = 0; int j = 0; j 0 j < s.length()/2 j s.length()/2 s.length() s.length s 2 j++ j++ j {
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			} {
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			} if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				} s.charAt(j) != s.charAt(s.length()-1-j) s.charAt(j) s.charAt s j s.charAt(s.length()-1-j) s.charAt s s.length()-1-j s.length()-1-j s.length() s.length s 1 j {
					tf = false;
					break;
				} tf = false tf false break; if(tf) ans++; tf ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	}
} public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	}
} Main
import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Deque;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int ans = 0;
		
		for(int i = A; i <= B; i++){
			String s = String.valueOf(i);
			boolean tf = true;
			//System.out.println(s + ":");
			for(int j = 0; j < s.length()/2; j++){
				//System.out.print(s.charAt(j));
				if(s.charAt(j) != s.charAt(s.length()-1-j)){
					tf = false;
					break;
				}
			}
			//System.out.println();
			if(tf) ans++;
		}
		
		System.out.println(ans);
	}
}