import java.util.*;

public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	}
} import java.util.*; util.* java public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		} ; {
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		} {
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		} int H = sc.nextInt(); H sc.nextInt() sc.nextInt sc int W = sc.nextInt(); W sc.nextInt() sc.nextInt sc if(H == 0 && W == 0)
				break; H == 0 && W == 0 H == 0 H 0 W == 0 W 0 break; for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			} 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.print("\n");
			} {
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			} 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.print("\n") System.out.print System.out System System.out "\n" System.out.print("\n") System.out.print System.out System System.out "\n" String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		for(;;){
			int H = sc.nextInt();
			int W = sc.nextInt();
			
			if(H == 0 && W == 0)
				break;
		
			for(int i = 0;i < H;i++){
				for(int j = 0;j < W;j++){
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
		}
	}
} Main
import java.util.*;

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