using System;

public class Program

{

    public static void Main()

    {

        int number = 10;

​

            for (int rows = 0; rows <number; rows++)

            {

                for (int col = 0; col < number; col++)

                {

                    if (rows == 0 || rows == number - 1 || col == 0 || col == number - 1 || col ==rows || col+rows == number-1)

                    {

                        Console.WriteLine(" x");

                    }

                    else

                    {

                        Console.WriteLine(" -");

                    }

                }

    }

}