import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	}

} Main public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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 {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		} String[] inputNum = br.readLine().split(" "); inputNum br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " int H = Integer.parseInt(inputNum[0]); H Integer.parseInt(inputNum[0]) Integer.parseInt Integer inputNum[0] inputNum 0 int W = Integer.parseInt(inputNum[1]); W Integer.parseInt(inputNum[1]) Integer.parseInt Integer inputNum[1] inputNum 1 if (H == 0 && W == 0) {
				break;
			} H == 0 && W == 0 H == 0 H 0 W == 0 W 0 {
				break;
			} 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 "" String[] args args public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	}

} public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


		while (true) {
			String[] inputNum = br.readLine().split(" ");
			int H = Integer.parseInt(inputNum[0]);
			int W = Integer.parseInt(inputNum[1]);

			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("");

		}



	}

}