Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Ex Input:
Industrial halocarbons are effective ozone-depleters for ____ reasons.

Ex Output:
two


Ex Input:
Earthquakes are most frequent where ____ or more plates meet.

Ex Output:
two


Ex Input:
Female sturgeon spawn only every ____ to seven years.

Ex Output:

four