import java.io.IOException;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) throws IOException{
		Scanner sc = new Scanner(System.in);

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

		sc.close();
	}
} import java.io.IOException; IOException java.io import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) throws IOException{
		Scanner sc = new Scanner(System.in);

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

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

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

		sc.close();
	} 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;
			}

			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;
			}

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

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

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

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

		sc.close();
	}
} Main
import java.io.IOException;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) throws IOException{
		Scanner sc = new Scanner(System.in);

		while(true) {
			int H = sc.nextInt();
			int W = sc.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();
		}

		sc.close();
	}
}
