import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

} Main public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	} main {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	} Scanner s = new Scanner(System.in); s new Scanner(System.in) while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} true {
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} int H = s.nextInt(); H s.nextInt() s.nextInt s int W = s.nextInt(); W s.nextInt() s.nextInt s if(H==0 && W==0){
				break;
			} H==0 && W==0 H==0 H 0 W==0 W 0 {
				break;
			} break; for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			} int i=1; int i=1; i 1 i<=H i H i++ i++ i {
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			} {
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			} for(int j=1; j<=W; j++){
					System.out.print("#");
				} int j=1; int j=1; j 1 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 s.close() s.close s String[] args args public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

}