TCC positions
    :param str text: text to be tokenized to character clusters
    :return: list of the end of subwords

def tcc_pos(text: str) -> Set[int]:
    """
    TCC positions
    :param str text: text to be tokenized to character clusters
    :return: list of the end of subwords
    """
    if not text or not isinstance(text, str):
        return set()

    p_set = set()
    p = 0
    for w in tcc(text):
        p += len(w)
        p_set.add(p)

    return p_set