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

Example Input: Sexual maturity is achieved by the age of _ months.
Example Output: three

Example Input: Trees can also be air layered but air layering usually takes four to _ months to be successful.
Example Output: six

Example Input: Tumors usually shrink within _ to two days of therapy.
Example Output:
one