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.

Example Input: Plants produce seed at ____ years of age.
Example Output: eight

Example Input: Environmentalists warn that ____ turtle species are in severe decline from over-exploitation.
Example Output: six

Example Input: Bond angles The bond angle defined by ____ atoms is calculated.
Example Output:
three