import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		
		while(true){
			String str[] = scan.nextLine().split(" ");
			int h = Integer.parseInt(str[0]);
			int w = Integer.parseInt(str[1]);
			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();
		}
	}
} 
/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