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

Example Input: Females inherit _ X chromosomes, one from each parent.
Example Output: two

Example Input: Induction also operates early in development, even before the _ layered embryo forms.
Example Output: three

Example Input: Women are twice as likely to suffer from depression, but _ times as many men commit suicide.
Example Output:
three