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: Most species have ____ toes, three of which are forward-pointing.
Example Output: four

Example Input: Seasonal records indicate that, in most years, ____ generations occur.
Example Output: two

Example Input: Gray whales reach sexual maturity at ____ or nine years.
Example Output:
eight