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 cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	}
} import java.util.Scanner; Scanner 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 cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();

		int cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();

		int cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	} 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 cnt = 0; cnt 0 for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		} int i = a; int i = a; i a i <= b i b i++ i++ i {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		} {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		} int num = i; num i int dig1 = num % 10; dig1 num % 10 num 10 int dig2 = (num / 10) % 10; dig2 (num / 10) % 10 (num / 10) num 10 10 int dig4 = (num / 1000) % 10; dig4 (num / 1000) % 10 (num / 1000) num 1000 10 int dig5 = num / 10000; dig5 num / 10000 num 10000 if( dig1 == dig5 && dig2 == dig4)
				cnt++; dig1 == dig5 && dig2 == dig4 dig1 == dig5 dig1 dig5 dig2 == dig4 dig2 dig4 cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt 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 cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();

		int cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	}
} Main
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 cnt = 0;
		for(int i = a; i <= b; i++) {
			int num = i;
			int dig1 = num % 10;
			int dig2 = (num / 10) % 10;
			int dig4 = (num / 1000) % 10;
			int dig5 = num / 10000;
			if( dig1 == dig5 && dig2 == dig4)
				cnt++;
		}
		System.out.println(cnt);
	}
}
