using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _03.Striped_Towel__PB___30_August_2015_
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());

            for (int i = 0; i < 3; i++)
            {
                Console.Write('#');
                Console.Write("..");
                Console.Write('#');
                Console.Write("..");
            }

        }
    }
}