private IEnumerable<int> JoeySkipLast(IEnumerable<int> numbers, int count)
        {
            var sourceEnumerator = numbers.GetEnumerator();
            var queue = new Queue<int>();
            while (sourceEnumerator.MoveNext())
            {
                var current = sourceEnumerator.Current;

                if (queue.Count == count)
                {
                    yield return queue.Dequeue();
                }
                queue.Enqueue(current);
            }
        }