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: Potential energy is divided into ____ different types of energy.
Example Output: three

Example Input: Prairie dogs bear four or ____ young per litter.
Example Output: five

Example Input: Navigators recognize up to ____ different swells, one from each octant of the compass.
Example Output:
eight