import java.util.Scanner;
public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	}
} Main public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	} main {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while true {
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		} int h=sc.nextInt(); h sc.nextInt() sc.nextInt sc int w=sc.nextInt(); w sc.nextInt() sc.nextInt sc if(h==0 && w==0) break; h==0 && w==0 h==0 h 0 w==0 w 0 break; StringBuilder shp=new StringBuilder(); shp new StringBuilder() for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for  int i=0; int i=0; i 0 i<h i h i++ i++ i {
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for  {
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			} for (int j=0;j<w;j++){
					shp.append("#");
				} int j=0; int j=0; j 0 j<w j w j++ j++ j {
					shp.append("#");
				} {
					shp.append("#");
				} shp.append("#") shp.append shp "#" shp.append("\n") shp.append shp "\n" System.out.println(shp) System.out.println System.out System System.out shp String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	}
} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0 && w==0) break;
			StringBuilder shp=new StringBuilder();
			
			for (int i=0;i<h;i++){
				for (int j=0;j<w;j++){
					shp.append("#");
				}
				shp.append("\n");
			}//for 
			System.out.println(shp);
		}//while
	}
}