

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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; j<=W; j++){
						System.out.print('#');
					}
					System.out.println();
			}
			System.out.println();
		} true {
			//???
			int H = sc.nextInt();
			//?¨?
			int W = sc.nextInt();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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 =1; i <=H; i++){
				//???????????¶???
				for(int j =1; j<=W; j++){
						System.out.print('#');
					}
					System.out.println();
			} int i =1; int i =1; i 1 i <=H i H i++ i++ i {
				//???????????¶???
				for(int j =1; j<=W; j++){
						System.out.print('#');
					}
					System.out.println();
			} {
				//???????????¶???
				for(int j =1; j<=W; j++){
						System.out.print('#');
					}
					System.out.println();
			} for(int j =1; j<=W; j++){
						System.out.print('#');
					} int j =1; int j =1; j 1 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; 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();
			//??\?????????0????????????
			if(H ==0 && W ==0){
				break;
			}
			//?¨?????????¶???
			for(int i =1; i <=H; i++){
				//???????????¶???
				for(int j =1; j<=W; j++){
						System.out.print('#');
					}
					System.out.println();
			}
			System.out.println();
		}
	}
}