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

Example Input: House wrens are small birds, four and a half to _ and a four inches in length.
Example Output: five

Example Input: Beavers have an average of _ young once a year.
Example Output: four

Example Input: Female gorillas give birth to one infant after a pregnancy of nearly _ months.
Example Output:
nine