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:
Many bilingual people grow up speaking ____ languages.

Ex Output:
two


Ex Input:
Bond angles The bond angle defined by ____ atoms is calculated.

Ex Output:
three


Ex Input:
Harvesting occurs every three to ____ years in the winter after leaves fall from the trees.

Ex Output:

four