import java.util.Scanner;

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

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
} import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args){

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
} Main public static void main(String[] args){

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	} main {

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		} true {
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		} int h = scan.nextInt(); h scan.nextInt() scan.nextInt scan int w = scan.nextInt(); w scan.nextInt() scan.nextInt scan if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			} h == 0 && w == 0 h == 0 h 0 w == 0 w 0 {
				break;
			} break; {
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			} for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				} int a = 0; int a = 0; a 0 a < h a h a++ a++ a {
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				} {
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				} for(int b = 0; b < w; b++){
						System.out.print('#');
					} int b = 0; int b = 0; b 0 b < w b w b++ b++ b {
						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){

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
} public class Main{
	public static void main(String[] args){

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
} Main
import java.util.Scanner;

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

		Scanner scan = new Scanner(System.in);

		while(true){
			int h = scan.nextInt();
			int w = scan.nextInt();

			if(h == 0 && w == 0){
				break;
			}else{
				for(int a = 0; a < h; a++){
					for(int b = 0; b < w; b++){
						System.out.print('#');
					}
					System.out.println();
				}
				System.out.println();
			}
		}
	}
}