def rotate_cw(str_array: list[str]) -> list[str]:
    """
    Rotate a list of strings quarter-turn clock-wise

    :param str_array: array as a list of strings
    :return: array rotated clock-wise
    """

    hflip_array = str_array[::-1]
    cw_rot_array = list(''.join(c) for c in zip(*hflip_array))
    return cw_rot_array