import java.util.Scanner;

public class Main {
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		int height = scan.nextInt();
		int width = scan.nextInt();
		
		while(height != 0 || height != 0)
		{
			for(int i = 0;i < height;i++)
			{
				for(int j = 0;j < width;j++)
				{
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			height = scan.nextInt();
			width = scan.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