import java.util.Scanner;

public class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				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); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		}
	}
} Main public static void main(String args[]){
		Scanner scan = new Scanner(System.in); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		}
	} main {
		Scanner scan = new Scanner(System.in); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int H H W; W char a = '#'; a '#' for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		} ; {

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		} {

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		} H = scan.nextInt() H scan.nextInt() scan.nextInt scan W = scan.nextInt() W scan.nextInt() scan.nextInt scan 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(a);
				}
				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(a);
				}
				System.out.println();	
			} {
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			} for(int j = 0; j < W; j++){
					System.out.print(a);
				} int j = 0; int j = 0; j 0 j < W j W j++ j++ j {
					System.out.print(a);
				} {
					System.out.print(a);
				} System.out.print(a) System.out.print System.out System System.out a 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); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		}
	}
} public class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				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); 
		
		int H, W;
		char a = '#';
		
		for(;;){

			H = scan.nextInt();
			W = scan.nextInt();
			
			if(H == 0 && W ==0){
				break;
			}
			for(int i = 0; i < H; i++){
				for(int j = 0; j < W; j++){
					System.out.print(a);
				}
				System.out.println();	
			}
			System.out.println();
		}
	}
}