// Program 1: Kaprekar Numbers in a Range

import java.util.*;
class KaprekarRange {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int p = sc.nextInt();
        int q = sc.nextInt();
        int count = 0;
        if (p < 1 || q < p || q > 46340) {
            System.out.println("Invalid range");
            return;
        }
        for (int n = p; n <= q; n++) {
            int square = n * n;
            int temp = square;
            int digits = 0;
            do {
                digits++;
                temp /= 10;
            } while (temp > 0);
            int divisor = 1;
            for (int i = 0; i < (digits + 1) / 2; i++) {
                divisor *= 10;
            }
            // Check the two parts of the square.
            if (square / divisor + square % divisor == n) {
                System.out.println(n);
                count++;
            }
        }
        System.out.println("Frequency = " + count);
    }
}