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: Pacific salmon leave their home stream, swim out to sea and return ____ to six years later to spawn.
Example Output: one

Example Input: Some tropical species have ____ or three generations per year.
Example Output: two

Example Input: Handguns have ____ purposes other than killing people.
Example Output:
no