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 aquatic life does well in water with oxygen concentrations of ____ parts per million.
Example Output: nine

Example Input: Nests Have at least one nest for every three to ____ hens.
Example Output: four

Example Input: Most ducks acquire breeding plumage in the fall, ____ or seven months before other birds.
Example Output:
six