import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				for (int i = 0; i < H; i++) {
					for (int j = 0; j < W; j++) {
						System.out.print("#");
					}
					System.out.println("");
				}
				System.out.println("");
			}
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				for (int i = 0; i < H; i++) {
					for (int j = 0; j < W; j++) {
						System.out.print("#");
					}
					System.out.println("");
				}
				System.out.println("");
			}
		} true {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 = sc.nextInt(); H sc.nextInt() sc.nextInt sc int W = sc.nextInt(); W sc.nextInt() sc.nextInt sc if (H == 0 && W == 0) {
				break;
			} else {
				for (int i = 0; i < H; i++) {
					for (int j = 0; j < W; j++) {
						System.out.print("#");
					}
					System.out.println("");
				}
				System.out.println("");
			} H == 0 && W == 0 H == 0 H 0 W == 0 W 0 {
				break;
			} break; {
				for (int i = 0; i < H; i++) {
					for (int j = 0; j < W; j++) {
						System.out.print("#");
					}
					System.out.println("");
				}
				System.out.println("");
			} 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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				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 sc = new Scanner(System.in);

		while (true) {
			int H = sc.nextInt();
			int W = sc.nextInt();
			if (H == 0 && W == 0) {
				break;
			} else {
				for (int i = 0; i < H; i++) {
					for (int j = 0; j < W; j++) {
						System.out.print("#");
					}
					System.out.println("");
				}
				System.out.println("");
			}
		}
	}
}
