using System;

public class Program

{

    public static void Main()

    {

        int n =int.Parse(Console.ReadLine());

        string s = "*";

        string s2 = "";

        string s1 = "";

        string sm = "";

        int n1 = n/2;

        for(int g = 0;g<n1;g++)

        {

            s2 += "_";

        }

        for(int i =1;i<=n1;i++)

        {

            Console.WriteLine(s2+s);

            s2 = s2.Remove(s2.Length-1);

            s +="**";

        }

        for(int m = 0;m<n;m++)

        {

            sm+="*";

        }

        Console.WriteLine(sm);

        for(int l = 0;l<=n1;l++)

        {

            s1 += "_";

            s = s.Remove(s.Length-2);

            Console.WriteLine(s1+s);

        }

    }

}