static void Main(string[] args)
{
Dequeue <int> q = new Dequeue <int>();
for (int i = 1; i <= 12; i++)
{
q.insertFront(i);
}
q.printQueue();
q.deleteFront();
q.deleteFront();
q.insertFront(11);
q.insertFront(12);
q.printQueue();
q.deleteRear();
q.deleteRear();
q.insertRear(13);
q.insertRear(14);
q.printQueue();
}