import java.util.Scanner;
import java.io.IOException;

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