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

namespace Template
{
    internal class Client
    {
        public static void HowToTest()
        {
            Letter letter = new SalesLetter();
            letter.Send();

            letter = new OfferLetter();
            letter.Send();
        }
    }
}