def intersect(lhs_list, rhs_list):
    """Return the common elements of two lists

    Parameters
    ----------
    lhs_list : list
        A list of some type that can be compared using `in`
    rhs_list : list
        A list of some type that can be compared using `in`

    Returns
    -------
    list
        A list of common elements

    """
    return list(filter(lambda elem: elem in rhs_list, lhs_list))