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: Dogs have to be ____ months old before they are spayed or neutered.
Example Output: six

Example Input: Box turtles are mature and capable of mating at ____ years old.
Example Output: five

Example Input: Ethical religions fall into ____ subcategories.
Example Output:
two