import re

def parse_number(number):
    pattern = r'^(?:\+?1[- ])?(\(\d{3}\)|\d{3})[-. ](\d{3})[-. ](\d{4})$'

    if not re.fullmatch(pattern, number):
        raise ValueError("Ungültige Telefonnummer")

    segments = re.search(pattern, number)

    ortsvorwahl = segments.group(1).replace("(", "").replace(")", "")
    amtskennziffer = segments.group(2)
    vorwahl = segments.group(3)

    if ortsvorwahl[0] <= '1' and ortsvorwahl[0] >= '0':
        raise ValueError("Ungültige Telefonnummer")

    if (vorwahl[0] <= '1' and vorwahl[0] >= '0') or vorwahl[1] == '9':
        raise ValueError("Ungültige Telefonnummer")

    return "1-" + ortsvorwahl + "-" + amtskennziffer + "-" + vorwahl