private static IEnumerable<Position> Get360Positions(Position position)
{
yield return position.Left();
yield return position.Up().Left();
yield return position.Up();
yield return position.Up().Right();
yield return position.Right();
yield return position.Down().Right();
yield return position.Down();
yield return position.Down().Left();
}
private int CalcWarningUpAndDown(Position position, int warning)
{
warning += TryLook(position.Up());
warning += TryLook(position.Down());
return warning;
}