queue

class Queue:
    def __init__(self):
        self.items = []

    def is_empty(self):
        return len(self.items) == 0

    def enqueue(self, item):
        self.items.append(item)

    def dequeue(self):
        if not self.is_empty():
            return self.items.pop(0)
        else:
            return "Queue is empty"

    def front(self):
        if not self.is_empty():
            return self.items[0]
        else:
            return "Queue is empty"

    def size(self):
        return len(self.items)

# Example usage
queue = Queue()

print("Is the queue empty?", queue.is_empty())  # True

queue.enqueue("A")
queue.enqueue("B")
queue.enqueue("C")

print("Queue size:", queue.size())  # 3
print("Front item:", queue.front())  # A

print("Dequeued item:", queue.dequeue())  # A
print("New front item:", queue.front())  # B

print("Queue size after dequeue:", queue.size())  # 2