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

Example Input: Human sperm comes in _ varieties, mixed.
Example Output: three

Example Input: Skunks tear out divots of turf that are _ to six inches in diameter.
Example Output: three

Example Input: Female smokers are _ times as likely to have moderate to severe wrinkling as nonsmokers.
Example Output:
three