using System;

public class Program

{

    public static void Main()

    {

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

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

{

var stars = new string('*',i);

var spaces = new string(' ', n - 1);

Console.Write(spaces);

Console.Write(stars);

Console.Write(" I ");

Console.Write(stars);

Console.WriteLine(spaces);

​

}

}

    }

​