import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String args[]) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String str = br.readLine();
			String[] w_h = str.split(" ", 0);
			int h = Integer.parseInt(w_h[0]);
			int w = Integer.parseInt(w_h[1]);
			if (w == 0 && h == 0) {
				break;
			}
			for (int j = 0; j < h; j++) {
				for (int i = 0; i < w; i++) {
					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