import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
}	 import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
} Main public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	} main {
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int i i v; v for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		} ; {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		} {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		} int h = scan.nextInt(); h scan.nextInt() scan.nextInt scan int w = scan.nextInt(); w scan.nextInt() scan.nextInt scan if(h == 0 && w == 0)
				break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			} i = 1; i = 1 i 1 i <= h i h ++i ++i i {
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			} {
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			} for(v = 1; v <= w; ++v){
					System.out.print("#");
				} v = 1; v = 1 v 1 v <= w v w ++v ++v v {
					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 public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
} public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
} Main
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
		}
	}
}	