import java.text.DecimalFormat;
import java.util.Scanner;

public class Main {

	static DecimalFormat df = new DecimalFormat("0.0000000000000000000");

	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	}

} import java.text.DecimalFormat; DecimalFormat java.text import java.util.Scanner; Scanner java.util public class Main {

	static DecimalFormat df = new DecimalFormat("0.0000000000000000000");

	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	}

} Main static DecimalFormat df = new DecimalFormat("0.0000000000000000000"); df new DecimalFormat("0.0000000000000000000") public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	} main {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} true {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} int h = sc.nextInt(); h sc.nextInt() sc.nextInt sc int w = sc.nextInt(); w sc.nextInt() sc.nextInt sc if (h == 0 && w == 0) break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} int i = 0; int i = 0; i 0 i < h i h i++ i++ i {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} for (int j = 0; j < w; j++) {
					System.out.print("#");
				} int j = 0; int j = 0; j 0 j < w j w j++ j++ j {
					System.out.print("#");
				} {
					System.out.print("#");
				} System.out.print("#") System.out.print System.out System System.out "#" System.out.println() System.out.println System.out System System.out System.out.println() System.out.println System.out System System.out sc.close() sc.close sc String[] args args public class Main {

	static DecimalFormat df = new DecimalFormat("0.0000000000000000000");

	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	}

} public class Main {

	static DecimalFormat df = new DecimalFormat("0.0000000000000000000");

	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	}

} Main
import java.text.DecimalFormat;
import java.util.Scanner;

public class Main {

	static DecimalFormat df = new DecimalFormat("0.0000000000000000000");

	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}

		sc.close();
	}

}