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: Reds can benefit from ____ to nine years' aging .
Example Output: seven

Example Input: Rhinos are herbivores with barrel shapedbodies, thick legs and feet with ____ toes.
Example Output: three

Example Input: Many households have ____ working parents.
Example Output:
two