The queue is: true 

The queue is: true $ 

The queue is: true $ 34567 

The queue is: true $ 34567 hello 

true dequeued
The queue is: $ 34567 hello 

$ dequeued
The queue is: 34567 hello 

34567 dequeued
The queue is: hello 

hello dequeued
Empty queue

EmptyListException: The queue is empty