In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Example Input: Ice jams cause flooding because of _ main features.
Example Output: two

Example Input: Saturated bonds are when each of the carbons has _ single bonds as in the top figure.
Example Output: four

Example Input: Smoking imposes _ costs on the nation's taxpayers that go uncompensated.
Example Output:
no