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: Calves are born after a gestation of ____ months.
Example Output: nine

Example Input: Most aquatic life does well in water with oxygen concentrations of ____ parts per million.
Example Output: nine

Example Input: Airplanes provide safe travel for ____ main reasons.
Example Output:
two