import java.util.Scanner;
public class Main {
	private static Scanner sc;

	public static void main(String[] args) {
	   sc = new Scanner(System.in);
	 
	   while(true){
	   int h=sc.nextInt();
	   int w=sc.nextInt();
	   if(h==0&&w==0)break;
	   else for(int i = 0;i<h;i++){
		   int m=0;   
		   while(m<w){
			   System.out.print("#");
			   m=m+1;
		   }
		   
	         System.out.println();
   }
	   System.out.println();
  }  
 }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz