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

Input: Consider Input: Flatworms exhibit _ forms of life styles, free-living and parasitic.

Output: two


Input: Consider Input: Ospreys reach sexual maturity between _ and five years of age.

Output: three


Input: Consider Input: Climatic regions Contrasts between the interior and the coasts produce _ main climatic regions.


Output: six