import re


def find_next_nothing(body, current_nothing):
    """
    Find the next nothing from the response body.
    """
    m = re.search('and the next nothing is ([0-9]+)', body)
    if m is not None:
        return int(m.group(1))
    else:
        if body == 'Yes. Divide by two and keep going.':
            # There is an exception to the rule where we are told to divide!
            return current_nothing / 2