using System;
using System.IO;
using System.Text.RegularExpressions;
public class Problem1
{
    public static void Main()
    {
        FileStream file = new FileStream("DATA1.txt", FileMode.Open);
        StreamReader sr = new StreamReader(file);
        String temp = sr.ReadToEnd();
        String[] lines = Regex.Split(temp, "\n");

        FileStream file2 = new FileStream("OUT1.txt", FileMode.Create);
        StreamWriter sw = new StreamWriter(file2);
        foreach (String line in lines)
        {
            if (line.Length == 0)
                break;
            int q = Convert.ToInt32(line[0].ToString());
            Console.WriteLine(q);
            int stars = -1;
            for (int i = 1; i <= (q / 2) + 1; i++)
            {
                stars += 2;
                String lin = "";
                int dots = (q - stars) / 2;
                String d = "", s = "";
                for (int j = 0; j < dots; j++)
                {
                    d += ".";
                }
                for (int k = 0; k < stars; k++)
                {
                    s += "#";
                }
                lin = d + s + d;
                sw.WriteLine(lin);
            }
            for (int i = (q / 2); i > 0; i--)
            {
                stars -= 2;
                String lin = "";
                int dots = (q - stars) / 2;
                String d = "", s = "";
                for (int j = 0; j < dots; j++)
                {
                    d += ".";
                }
                for (int k = 0; k < stars; k++)
                {
                    s += "#";
                }
                lin = d + s + d;
                sw.WriteLine(lin);
            }
        }
        sw.Close();
        file2.Close();
    }
}