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: Humans grow with ____ sets of teeth.
Example Output: two

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

Example Input: Most people can remember a string of about ____ digits, e.g., a telephone number.
Example Output:
seven