from stacks.QueueStack import QueueStack
from stacks.DoubleListStack import DoubleListStack
from stacks.StackWithMax import StackWithMax
from stacks.Stack import Stack

cdd558b8261011790ae8cbbfffe914061e63450e
<mask token>

from stacks.QueueStack import QueueStack
from stacks.DoubleListStack import DoubleListStack
from stacks.StackWithMax import StackWithMax
from stacks.Stack import Stack
