def any_list_item(a, b):
    """Determine whether any item in ``a`` also exists in ``b``.

    :param a: The first list to be compared.
    :type a: list

    :param b: The second list to be compared.
    :type b: list

    :rtype: bool

    """
    for i in a:
        for j in b:
            if i == j:
                return True

    return False