arrow

import java.util.*;

class Main {
    public static String makeSymbols(String str, int num) {
        String symbol = "";
        int i = 0;
        while ( i < num) {
            symbol += str;
            i++;
        }
        return symbol;
    }

    public static void arrow(int n) {
        //top line
        System.out.print(makeSymbols(".", n / 2));
        System.out.print(makeSymbols("#", n));
        System.out.println(makeSymbols(".", n / 2));
        // top
        int i = 1;
        while (i <= n - 2) {
            System.out.print(makeSymbols(".", n / 2) + "#");
            System.out.print(makeSymbols(".", n - 2));
            System.out.println("#" + makeSymbols(".", n / 2));
            i++;
        }
        // middle
        System.out.print("#" + makeSymbols("#", n / 2));
        System.out.print(makeSymbols(".", n - 2));
        System.out.println("#" + makeSymbols("#", n / 2));
        // bot
        int dots = 1;
        while (dots < n - 1) {
            System.out.print(makeSymbols(".", dots) + "#");
            System.out.print(makeSymbols(".", (n * 2 - 1) - dots * 2 - 2) + "#");
            System.out.println(makeSymbols(".",dots));
            dots++;
        }
        System.out.println(makeSymbols(".",dots) + "#" + makeSymbols(".",dots));
    }

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        arrow(n);
    }
}