import random


def shuffle(alist):
    """Return a new shuffled list.

    >>> a = ["a", "b", "c", "d", "e"]
    >>> b = shuffle(a)
    >>> a
    ["a", "b", "c", "d", "e"]
    >>> b
    [...]
    """
    blist = alist.copy()
    random.shuffle(blist)
    return blist