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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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 a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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 a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				System.out.print("#");
			}
			System.out.println("");
		} int a=0; int a=0; a 0 a<H a H a++ a++ a {
			for(int b=0;b<W;b++) {
				System.out.print("#");
			}
			System.out.println("");
		} {
			for(int b=0;b<W;b++) {
				System.out.print("#");
			}
			System.out.println("");
		} for(int b=0;b<W;b++) {
				System.out.print("#");
			} int b=0; int b=0; b 0 b<W b W b++ b++ b {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				System.out.print("#");
			}
			System.out.println("");
		}
		System.out.println("");
		}
	}
}


