using System;

public class Program

{

    public static void Main()

    {

    for(int i=1;i<=5;i++)

    {

        for(int j=5;j>=1;j--) 

            if(i==1||j==5||j==1||i==5)

            {

                Console.Write("*");

            }

        else

            {

                Console.Write(" ");

            }

             Console.Write("\n");

}

    }

    }

​