# FIFO - First In First Out
# Forma que não deve ser usada

queue = []

queue.append('A')
print(queue)
queue.append('B')
print(queue)
queue.append('C')
print(queue)
print(queue.pop(0))
print(queue)
print(queue.pop(0))
print(queue)
print(queue.pop(0))
print(queue)