using System;

public class Program

{

    public static void Main()

    {

        for (int i = 1; i <= 8; i++)

            {

                for (int j = 1; j <= 4; j++)

                {

                    if (i % 2 == 0)

                    {

                        Console.Write("OX");

                    }

                    else

                    {

                        Console.Write("XO");

                    }

                }

                Console.Write("\n");

            }

    }

}