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

public class Main {
	public static void main(String[] args) throws Exception {
		InputStreamReader is = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(is);

		while (true) {
			String str = br.readLine();

			String[] num = getElement(str);

			int h = Integer.parseInt(num[0]);
			int w = Integer.parseInt(num[1]);

			if (h == 0 && w == 0) {
				break;
			}
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					System.out.print("#");
//					if (j == w - 1) {
//						System.out.print(" ");
//					}
				}
				System.out.print("\r\n");
			}
			System.out.print("\r\n");
		}

	}

	//??????????????????????????????????????????
	public static String[] getElement(String element) {
		return (element.split(" "));
	}
}
/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