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

Example Input: Hoatzin has typical foot with _ toes forwards and one backwards.
Example Output: three

Example Input: Asian lions divide themselves into _ prides.
Example Output: two

Example Input: Green iguanas are handsome creatures, but they can grow up to _ feet long, and be aggressive.
Example Output:
six