import java.util.Scanner;

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