public class Main {


		public static void main(String[] args) {
		java.util.Scanner scan = new java.util.Scanner(System.in);
		int h, w, i, t;
		
while(true){
		h = scan.nextInt();
		w = scan.nextInt();
		if(h == 0 && w == 0){
				break;
			}
		if(1 <= h && h <= 300 && 1 <= w && w <= 300){
			for(i = 0; i < h ; i++){
			for(t = 0; t < w ; t++){
				
				System.out.print("#");
				
			}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