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

public class Main {

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

		while(true){
			String str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 import java.util.StringTokenizer; StringTokenizer java.util public class Main {

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

		while(true){
			String str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine(); str br.readLine() br.readLine br StringTokenizer st = new StringTokenizer(str, " "); st new StringTokenizer(str, " ") int H = Integer.parseInt(st.nextToken()); H Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st int W = Integer.parseInt(st.nextToken()); W Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st 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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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 str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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;
import java.util.StringTokenizer;

public class Main {

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

		while(true){
			String str = br.readLine();
			StringTokenizer st = new StringTokenizer(str, " ");
			int H = Integer.parseInt(st.nextToken());
			int W = Integer.parseInt(st.nextToken());

			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("");
		}
	}
}

