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

Example Input: Flexible shapes are also shapes which have _ obvious way of being attacked.
Example Output: no

Example Input: Seasons mean very little in our world of _ hemispheres.
Example Output: two

Example Input: State law requires all dogs and cats _ months of age or older to be vaccinated against rabies.
Example Output:
three