import java.util.Scanner;

public class Main{
	public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	}
} import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	}
} Main public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int h h w; w h = sc.nextInt() h sc.nextInt() sc.nextInt sc w = sc.nextInt() w sc.nextInt() sc.nextInt sc while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		} h != 0 && w != 0 h != 0 h 0 w != 0 w 0 {
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		} 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 "" h = sc.nextInt() h sc.nextInt() sc.nextInt sc w = sc.nextInt() w sc.nextInt() sc.nextInt sc String [] args args public class Main{
	public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	}
} public class Main{
	public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	}
} Main
import java.util.Scanner;

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