import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    }
} import java.io.*; io.* java public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    }
} Main public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    } main {
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    } BufferedReader buf=new BufferedReader(new InputStreamReader(System.in)); buf new BufferedReader(new InputStreamReader(System.in)) StringBuilder sbu=new StringBuilder(); sbu new StringBuilder() while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        } true {
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        } String[] num=buf.readLine().split(" "); num buf.readLine().split(" ") buf.readLine().split buf.readLine() buf.readLine buf " " int x=Integer.parseInt(num[0]); x Integer.parseInt(num[0]) Integer.parseInt Integer num[0] num 0 int y=Integer.parseInt(num[1]); y Integer.parseInt(num[1]) Integer.parseInt Integer num[1] num 1 if(x == 0 && y == 0)break; x == 0 && y == 0 x == 0 x 0 y == 0 y 0 break; for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            } int i=0; int i=0; i 0 i<x i x i++ i++ i {
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            } {
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            } for(int j=0; j<y; j++){
                    sbu.append("#");
                } int j=0; int j=0; j 0 j<y j y j++ j++ j {
                    sbu.append("#");
                } {
                    sbu.append("#");
                } sbu.append("#") sbu.append sbu "#" sbu.append("\n") sbu.append sbu "\n" sbu.append("\n") sbu.append sbu "\n" System.out.print(sbu) System.out.print System.out System System.out sbu String[] args args public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    }
} public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    }
} Main
import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sbu=new StringBuilder();
        
        while(true){
            String[] num=buf.readLine().split(" ");
            int x=Integer.parseInt(num[0]);
            int y=Integer.parseInt(num[1]);
            
            if(x == 0 && y == 0)break;
            
            for(int i=0; i<x; i++){
                for(int j=0; j<y; j++){
                    sbu.append("#");
                }
                sbu.append("\n");
            }
            sbu.append("\n");
        }
        System.out.print(sbu);
    }
}