def get_unique_list(items):
    """ Return a sorted de-duplicated list of items from input list.

    :type items: List(str)
    :param items: The input list of strings
    :return: Sorted list with duplicates removed
    """
    items.sort()
    result = []
    previous = ''
    for item in items:
        if item != previous:
            result.append(item)
            previous = item
    return result