Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Input: Consider Input: Sexual maturity occurs at ____ to four years for females and four to five years for males.

Output: three


Input: Consider Input: Some women experience a labor of three to ____ days.

Output: five


Input: Consider Input: Insects also go through ____ different pathways of development .


Output: two