def ascii_to_bit(ascii_string: str) -> str:
    """
    Converts a given string of ASCII chars to a string of bits.
    :param ascii_string:
    :return:
    """
    result = bin(int.from_bytes(ascii_string.encode(), 'big'))
    result = result[2:] # We don't want this '0b' at the beginning.
    while len(result) % 8 != 0:
        result = '0' + result
    return result