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

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

    def dequeue(self):
        return self.items.pop(0)

    def empty(self):
        return self.items == []

    def __str__(self):
        return str(list(self.items))

q = Queue()

q.enqueue("Dave")
print("Dave got in line:  " + str(q))

q.enqueue("Eliza")
print("Eliza got in line:  " + str(q))

q.enqueue("Alice")
print("Alice got in line:  " + str(q))

next = q.dequeue()
print(next + " is served:  " + str(q))

q.enqueue("Carol")
print("Carol got in line:  " + str(q))

q.enqueue("Betty")
print("Betty got in line:  " + str(q))

next = q.dequeue()
print(next + " is served:  " + str(q))

next = q.dequeue()
print(next + " is served:  " + str(q))

next = q.dequeue()
print(next + " is served:  " + str(q))