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: Mammals have ____ cervical vertebrae, a number that remains remarkably constant.
Example Output: seven

Example Input: Plants grow up to ____ feet tall and spread to about three feet.
Example Output: three

Example Input: Spiders possess ____ legs compared with the six of the insects.
Example Output:
eight