import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		}
	}
}  import java.util.Scanner; Scanner java.util class Main {
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		}
	}
} Main public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		}
	} main {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		} true {
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		} String str[] = scan.nextLine().split(" "); str scan.nextLine().split(" ") scan.nextLine().split scan.nextLine() scan.nextLine scan " " int h = Integer.parseInt(str[0]); h Integer.parseInt(str[0]) Integer.parseInt Integer str[0] str 0 int w = Integer.parseInt(str[1]); w Integer.parseInt(str[1]) Integer.parseInt Integer str[1] str 1 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.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 String[] args args
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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.println();
			}
			System.out.println();
		}
	}
} 