import java.util.Scanner;

public class Main{
	public static void main(String [] args){
		Scanner sc = new Scanner(System.in);
		int h,w;
		h = sc.nextInt();
		w = sc.nextInt();
		while(h != 0 && w != 0){
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = sc.nextInt();
			w = sc.nextInt();
		}
	}
}
/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