import java.util.Scanner;
public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
} import java.util.Scanner; Scanner java.util public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
} Main void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	} rect {
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	} Scanner s = new Scanner(System.in); s new Scanner(System.in) int h = s.nextInt(); h s.nextInt() s.nextInt s int w = s.nextInt(); w s.nextInt() s.nextInt s 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 = s.nextInt();
			w = s.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 = s.nextInt();
			w = s.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 = s.nextInt() h s.nextInt() s.nextInt s w = s.nextInt() w s.nextInt() s.nextInt s public static void main(String args[]){
		Main m = new Main();
		m.rect();
	} main {
		Main m = new Main();
		m.rect();
	} Main m = new Main(); m new Main() m.rect() m.rect m String args[] args public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
} public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
} Main
import java.util.Scanner;
public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.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 = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
}