def parse(box_size):
    """
    Return the dimensions of the box.

    Parameters
    ----------
    box_size : str
        The size of the box, represented as axbxc, where a, b, and c are the
        lengths of one side of the box, in feet.

    Returns
    -------
    3-tuple of float
        The lengths of each side of the box, from smallest to largest.

    """
    return sorted(int(i) for i in box_size.split("x"))