import java.util.InputMismatchException;
import java.util.Scanner;

public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

} import java.util.InputMismatchException; InputMismatchException java.util import java.util.Scanner; Scanner java.util public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

} Main public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	} main {

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			} true {
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			} try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				} catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				} InputMismatchException e {
					System.out.println("??¨??????:"+e);

				} System.out.println("??¨??????:"+e) System.out.println System.out System System.out "??¨??????:"+e "??¨??????:" e {
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				} int H=scan.nextInt(); H scan.nextInt() scan.nextInt scan int W=scan.nextInt(); W scan.nextInt() scan.nextInt scan if(H==0&&W==0)break; H==0&&W==0 H==0 H 0 W==0 W 0 break; for(int i=0;i<H;i++){
				for(int j=0;j<W;j++){
					System.out.print('#');
				}System.out.print('\n');
			  } 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.print('\n');
			  } {
				for(int j=0;j<W;j++){
					System.out.print('#');
				}System.out.print('\n');
			  } 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.print('\n') System.out.print System.out System System.out '\n' System.out.print('\n') System.out.print System.out System System.out '\n' scan.close() scan.close scan String[] args args public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

} public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

} Main
import java.util.InputMismatchException;
import java.util.Scanner;

public class Main{


	public static void main(String[] args){

    	Scanner scan = new Scanner(System.in);

			while(true){
				try{
            int H=scan.nextInt();
			int W=scan.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.print('\n');
			  }System.out.print('\n');

				}catch(InputMismatchException e){
					System.out.println("??¨??????:"+e);

				}

			}
        	scan.close();


	}

}