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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			count++;
    		}
    	} int i = A; int i = A; i A i <= B i B i++ i++ i {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			count++;
    		}
    	} {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			count++;
    		}
    	} String num = Integer.toString(i); num Integer.toString(i) Integer.toString Integer i if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			count++;
    		} num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3) num.charAt(0) == num.charAt(4) num.charAt(0) num.charAt num 0 num.charAt(4) num.charAt num 4 num.charAt(1) == num.charAt(3) num.charAt(1) num.charAt num 1 num.charAt(3) num.charAt num 3 {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			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++) {
    		String num = Integer.toString(i);
    		if (num.charAt(0) == num.charAt(4) && num.charAt(1) == num.charAt(3)) {
    			count++;
    		}
    	}
    	System.out.println(count);
    }
}