import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			String[] lines = sc.nextLine().split(" ");
			int height = Integer.parseInt(lines[0]);
			int width = Integer.parseInt(lines[1]);
			if(height == 0 && width == 0) {
				break;
			} else {
				for(int i = 0;i < height;i++) {
					for(int j = 0;j < width;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