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.

Example Input: Plants produce seed at ____ years of age.
Example Output: eight

Example Input: Most dens are oval shape, six to ____ feet long and about six feet in height and width.
Example Output: nine

Example Input: Young rats are sexually mature in about ____ months.
Example Output:
three