def loll(unprintedd,completed):
    while unprintedd:
        corrent = unprintedd.pop()
        print('Printing model: ' + corrent)
        completed.appent(corrent)

def show(completed):
    print('Gotovo')
    for comp in completed:
        print(comp)
unprintedd = ['lol', 'kek', 'cheb']
completed = []
loll = (unprintedd, completed)
show(completed)