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

        while(true){
            int h = in.nextInt();
            int w = in.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");
    } 
  }                                                                                           
} import java.util.Scanner; Scanner java.util class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(true){
            int h = in.nextInt();
            int w = in.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");
    } 
  }                                                                                           
} Main public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(true){
            int h = in.nextInt();
            int w = in.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");
    } 
  } main {
        Scanner in = new Scanner(System.in);

        while(true){
            int h = in.nextInt();
            int w = in.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");
    } 
  } Scanner in = new Scanner(System.in); in new Scanner(System.in) while(true){
            int h = in.nextInt();
            int w = in.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");
    } true {
            int h = in.nextInt();
            int w = in.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 = in.nextInt(); h in.nextInt() in.nextInt in int w = in.nextInt(); w in.nextInt() in.nextInt in 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.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" String[] args args
import java.util.Scanner;
class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(true){
            int h = in.nextInt();
            int w = in.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");
    } 
  }                                                                                           
}