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

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

	    while (true) {
		    String line = br.readLine();
		    int H = Integer.parseInt(line.split(" ")[0]);
		    int W = Integer.parseInt(line.split(" ")[1]);

		    if (H == 0 && W == 0) break;

		    display(H, W);

	    }
	}

	public static void display(int h, int w) {
		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