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

Example Input: Respiratory therapists complete two to ____ years of education.
Example Output: four

Example Input: Bloodroot flowers are pure white and produce ____ petals.
Example Output:
eight