using System;

namespace _08.SquarePrint
{
    class SquarePrint
    {
        static void Main()
        {
            int numOfRaws = int.Parse(Console.ReadLine());

            for (int a = 1; a <= numOfRaws; a++)
                Console.Write("*");
                Console.WriteLine();
            for (int row =  1; row <= numOfRaws - 2; row++)
            {
                Console.Write("*");
                for (int b = 1; b <= numOfRaws - 2; b++)
                    Console.Write(" ");
                Console.Write("*");
                Console.WriteLine();
            }
            for (int a = 1; a <= numOfRaws; a++)
                Console.Write("*");
            Console.WriteLine();
        }
    }
}