import java.util.*;
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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	}
} import java.util.*; util.* java 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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	}
} 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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt();
		int B = sc.nextInt();
		int count =0;
		for(int i=A;i<=B;i++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	} 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 count =0; count 0 for(int i=A;i<=B;i++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		} int i=A; int i=A; i A i<=B i B i++ i++ i {
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		} {
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		} int a = i / 10000; a i / 10000 i 10000 int b = i % 10; b i % 10 i 10 int c = i / 10 % 10; c i / 10 % 10 i / 10 i 10 10 int d = i / 1000 % 10; d i / 1000 % 10 i / 1000 i 1000 10 if(a==b&&c==d){
				count++;
			} a==b&&c==d a==b a b c==d c d {
				count++;
			} count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args 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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	}
} 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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	}
} Main
import java.util.*;
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++){
			int a = i / 10000;
			int b = i % 10;
			int c = i / 10 % 10;
			int d = i / 1000 % 10;
			if(a==b&&c==d){
				count++;
			}
		}
		System.out.println(count);
	}
}
