import java.util.Scanner;

public class Main {

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

	public static void main(String[] args) {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	}
} Main public static void main(String[] args) {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	} main {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	} Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		} ; {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		} {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		} int h = stdIn.nextInt(); h stdIn.nextInt() stdIn.nextInt stdIn int w = stdIn.nextInt(); w stdIn.nextInt() stdIn.nextInt stdIn 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 public class Main {

	public static void main(String[] args) {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	}
} public class Main {

	public static void main(String[] args) {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner stdIn = new Scanner(System.in);
		
		for (; ;) {
			int h = stdIn.nextInt();
			int w = stdIn.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.println();
			}
			System.out.println();
		}
	}
}

