import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++){
				System.out.print("#");
			}
			System.out.println();
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++){
				System.out.print("#");
			}
			System.out.println();
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	} main {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

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

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++){
				System.out.print("#");
			}
			System.out.println();
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++){
				System.out.print("#");
			}
			System.out.println();
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();

		while (true) {
			draw(h,w);
			System.out.println();
			h = sc.nextInt();
			w = sc.nextInt();
			if (h == 0 && w == 0)
				break;
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++){
				System.out.print("#");
			}
			System.out.println();
		}
	}
}