import java.util.Scanner;

class Main {

	public static void main(String[] args) {

		int h, w;

		Scanner stdIn = new Scanner(System.in);

		while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		}

	}

} import java.util.Scanner; Scanner java.util class Main {

	public static void main(String[] args) {

		int h, w;

		Scanner stdIn = new Scanner(System.in);

		while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		}

	}

} Main public static void main(String[] args) {

		int h, w;

		Scanner stdIn = new Scanner(System.in);

		while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		}

	} main {

		int h, w;

		Scanner stdIn = new Scanner(System.in);

		while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			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 h w; w Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		} true {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		} h = stdIn.nextInt() h stdIn.nextInt() stdIn.nextInt stdIn w = stdIn.nextInt() w stdIn.nextInt() stdIn.nextInt stdIn if((h+w) == 0) {
				System.exit(0);
			} (h+w) == 0 (h+w) h w 0 {
				System.exit(0);
			} System.exit(0) System.exit System 0 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 String[] args args
import java.util.Scanner;

class Main {

	public static void main(String[] args) {

		int h, w;

		Scanner stdIn = new Scanner(System.in);

		while (true) {

			h = stdIn.nextInt();
			w = stdIn.nextInt();

			if((h+w) == 0) {
				System.exit(0);
			}

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
		}

	}

}