using System;

public class Program

{

    public static void Main(string[] args)

    {

        for(int col=0;col<8;col++)

        {

            for(int row=0;row<8;row++)

            {

            if((row+col)%2==0)

            {

                Console.Write("X");

            }

            else if((row+col)%2==1)

            {

                Console.Write("O");

            }

            else

            {

                Console.WriteLine("Neither X or O");

            }

            }

            Console.WriteLine();

        }

    }

}