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

Example Input: Morocco has _ perennial rivers and many dams have been built with potential for power generation.
Example Output: four

Example Input: Lantanas bloom in a dense head with individual tubular florets with four or _ lobes.
Example Output: five

Example Input: Octopuses have _ shells but the most advanced mollusc.
Example Output:
no