import java.util.*;

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) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		}		
		
		
	}
} import java.util.*; util.* java 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) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		}		
		
		
	}
} 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) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		}		
		
		
	} main {
		Scanner sc = new Scanner(System.in);
		
		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			
			if(h == 0) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		}		
		
		
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			
			if(h == 0) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		} true {
			int h = sc.nextInt();
			int w = sc.nextInt();
			
			if(h == 0) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		} int h = sc.nextInt(); h sc.nextInt() sc.nextInt sc int w = sc.nextInt(); w sc.nextInt() sc.nextInt sc if(h == 0) break; h == 0 h 0 break; for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			} int j=0; int j=0; j 0 j<h j h j++ j++ j {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			} {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			} for(int i=0; i<w; i++) {
					System.out.print("#");
				} int i=0; int i=0; i 0 i<w i w i++ i++ i {
					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 sc = new Scanner(System.in);
		
		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			
			if(h == 0) break;
			
			for(int j=0; j<h; j++) {
				for(int i=0; i<w; i++) {
					System.out.print("#");
				}	
				System.out.println("");
			}
			
			System.out.println("");
		}		
		
		
	}
}
