import java.util.Scanner;

public class fraktaali3 {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int f = Integer.parseInt(in.nextLine());
		in.close();
		
		int layers = f - 1;
		int side = (int) Math.pow(2, layers);

		Boolean[] fractal = new Boolean[side * side];

		for (int i = 0; i < fractal.length; i++) {
			fractal[i] = true;
		}

		for (int width = 2; width <= side; width *= 2) {
			for (int subdivisiony = 0; subdivisiony < side / width; subdivisiony++) {
				for (int subdivisionx = 0; subdivisionx < side / width; subdivisionx++) {
					for (int y = width * subdivisiony + width / 2; y < width * (subdivisiony + 1); y++) {
						for (int x = width * subdivisionx + width / 2; x < width * (subdivisionx + 1); x++) {
							fractal[y * side + x] ^= true;
						}
					}
				}
			}
		}

		for (int y = 0; y < side; y++) {
			for (int x = 0; x < side; x++) {
				System.out.print(fractal[y * side + x] ? "#" : ".");
			}
			System.out.println("");
		}
	}
}