import java.util.*;

class Main {
    public static void main(String [] args){
        Scanner scan = new Scanner(System.in);
        
        while(true){
            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.println();
            }
            
            System.out.println();
        }
    }
} import java.util.*; util.* java class Main {
    public static void main(String [] args){
        Scanner scan = new Scanner(System.in);
        
        while(true){
            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.println();
            }
            
            System.out.println();
        }
    }
} Main public static void main(String [] args){
        Scanner scan = new Scanner(System.in);
        
        while(true){
            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.println();
            }
            
            System.out.println();
        }
    } main {
        Scanner scan = new Scanner(System.in);
        
        while(true){
            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.println();
            }
            
            System.out.println();
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) while(true){
            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.println();
            }
            
            System.out.println();
        } true {
            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.println();
            }
            
            System.out.println();
        } 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.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
import java.util.*;

class Main {
    public static void main(String [] args){
        Scanner scan = new Scanner(System.in);
        
        while(true){
            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.println();
            }
            
            System.out.println();
        }
    }
}