def cluster_points(cluster_name: str) -> list:
    """
    Return points composing the cluster, removing brackets and hyphen from cluster name,
    e.g. ((a)-(b))-(c) becomes [a, b, c].

    :param cluster_name: name of the cluster.
    :return: points forming the cluster.
    """
    return cluster_name.replace("(", "").replace(")", "").split("-")