static void Main(string[] args)
{
model model = new model();
model.Print();
Console.WriteLine(model.A());
Console.WriteLine($"\nB:");
foreach (var e in model.B())
{
Console.WriteLine(e);
}
Console.ReadLine();
Console.Clear();
model.Print();
model.C();
model.Print();
Console.ReadLine();
model.D();
model.Print();
Console.ReadLine();
}