from container import Container
from stack import Stack
from sack import Sack
def fill(c: Container) -> None:
    c.add(3)
    c.add(4)
    c.add(5)
    c.add(6)

def dele(c: Container) -> None:
    c.remove()
    c.remove()

s = Stack()
b = Sack()
fill(s)
print('s:'+str(s._storage))
fill(b)
print('b:'+str(b._storage))

dele(s)
print('s:'+str(s._storage))
dele(b)
print('b:'+str(b._storage))