import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; 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 stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        }
    }
} Main public static void main(String[] args){
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        }
    } main {
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        }
    } Scanner stdin = new Scanner(System.in); stdin new Scanner(System.in) int h; h int w; w while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        } true {
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        } h = stdin.nextInt() h stdin.nextInt() stdin.nextInt stdin w = stdin.nextInt() w stdin.nextInt() stdin.nextInt stdin if(h == 0 && w == 0)break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            } h <= 300 && w <= 300 h <= 300 h 300 w <= 300 w 300 {
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            } 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 String[] args args public class Main{
    public static void main(String[] args){
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; 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 stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        System.out.print("#");
                    }
                    System.out.println();
                }
                System.out.println();
            }
        }
    }
}