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: Marsupials have ____ vaginas and a double uterus.
Example Output: two

Example Input: Reds can benefit from ____ to nine years' aging .
Example Output: seven

Example Input: Most orangutans are four to ____ feet long, some can reach a length of six feet.
Example Output:
five