public static void main(String[] args) {
		Queue<String> q = new Queue<String>();
		while (!StdIn.isEmpty()) {
			String item = StdIn.readString();
			if (!item.equals("-"))
				q.enqueue(item);
			else if (!q.isEmpty())
				StdOut.print(q.dequeue() + "");
		}
		StdOut.println("(" + q.size() + " left on queue)");
	}