Queue Simulation with Enqueue and Dequeue Operations

You are tasked with simulating a simple queue management system. A queue is a data structure where elements are processed in a **First In, First Out (FIFO)** order, meaning that the first element added to the queue is the first one to be removed.

You need to process a series of commands where:

- **ENQUEUE** (or shorthand **E**) adds an element to the end of the queue.

- **DEQUEUE** (or shorthand **D**) removes the front element from the queue.

The program will take an integer input representing the number of commands, followed by a sequence of commands that either enqueue or dequeue elements from the queue. After processing all the commands, the program will output the remaining elements in the queue in the order they appear.

### Solution Breakdown:

1. **Queue Initialization:**

   - The queue is initialized as an empty structure. This is where elements will be added (via ENQUEUE) or removed (via DEQUEUE).

2. **Processing Commands:**

   - The program reads the total number of commands from the user.

   - It then iterates through each command:

     - If the command is **ENQUEUE** (or shorthand **E**), it appends the specified value to the end of the queue.

     - If the command is **DEQUEUE** (or shorthand **D**), it removes the element from the front of the queue, but only if the queue is not empty (to avoid errors).

3. **Final Output:**

   - After processing all the commands, the program prints out any remaining elements in the queue. These elements are printed in the same order they were enqueued but have not been dequeued.

### Example Walkthrough:

Given the input:

5

ENQUEUE 1

ENQUEUE 2

DEQUEUE

ENQUEUE 3

DEQUEUE

- First, two numbers (`1` and `2`) are enqueued.

- Then, the **DEQUEUE** command removes the first number (`1`), leaving `2` in the queue.

- Next, `3` is enqueued.

- Finally, another **DEQUEUE** removes the first element (`2`), leaving only `3` in the queue.

The final output will be:

3

 

This reflects the remaining element in the queue after processing all the commands.