def METHOD_NAME(bech):
    """Validate a Bech32 string, and determine HRP and data."""
    if (any(ord(x) < 33 or ord(x) > 126 for x in bech)) or (
        bech.lower() != bech and bech.upper() != bech
    ):
        return (None, None)
    bech = bech.lower()
    pos = bech.rfind("1")
    if pos < 1 or pos + 7 > len(bech) or len(bech) > 90:
        return (None, None)
    if not all(x in CHARSET for x in bech[pos + 1 :]):
        return (None, None)
    hrp = bech[:pos]
    data = [CHARSET.find(x) for x in bech[pos + 1 :]]
    if not bech32_verify_checksum(hrp, data):
        return (None, None)
    return (hrp, data[:-6])