import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
} import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
} Main public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	} main {
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) int H H W; W H = in.nextInt() H in.nextInt() in.nextInt in W = in.nextInt() W in.nextInt() in.nextInt in while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		} H!=0 || W!=0 H!=0 H 0 W!=0 W 0 {
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		} 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 H = in.nextInt() H in.nextInt() in.nextInt in W = in.nextInt() W in.nextInt() in.nextInt in String[] args args public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
} public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
} Main
import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
}