import java.util.Scanner;

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 j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				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);

			for(;;) {

				int H = sc.nextInt();
				int W = sc.nextInt();

				if(H == 0 && W == 0) {
					break;
				}

				for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	}
} 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 j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	} main {
		Scanner sc = new Scanner(System.in);

			for(;;) {

				int H = sc.nextInt();
				int W = sc.nextInt();

				if(H == 0 && W == 0) {
					break;
				}

				for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	} 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 j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			} ; {

				int H = sc.nextInt();
				int W = sc.nextInt();

				if(H == 0 && W == 0) {
					break;
				}

				for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			} {

				int H = sc.nextInt();
				int W = sc.nextInt();

				if(H == 0 && W == 0) {
					break;
				}

				for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				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;
				} H == 0 && W == 0 H == 0 H 0 W == 0 W 0 {
					break;
				} break; for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				} int j = 0; int j = 0; j 0 j < H j H j++ j++ j {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				} {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				} for(int k = 0; k < W; k++) {
						System.out.print("#");
					} int k = 0; int k = 0; k 0 k < W k W k++ k++ k {
						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.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);

			for(;;) {

				int H = sc.nextInt();
				int W = sc.nextInt();

				if(H == 0 && W == 0) {
					break;
				}

				for(int j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	}
} 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 j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	}
} Main
import java.util.Scanner;

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 j = 0; j < H; j++) {
					for(int k = 0; k < W; k++) {
						System.out.print("#");
					}
					System.out.print('\n');
				}
				System.out.println();
			}
	}
}