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

Example Input: Arthritis is the leading cause of disability in the state affecting about one in _ adults.
Example Output: three

Example Input: Blood pressure is expressed as _ different numbers.
Example Output: two

Example Input: Young rats become sexually mature at about _ months, with most living six months to a year.
Example Output:
three