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: Today there are ____ mating pairs.
Example Output: four

Example Input: Most health professionals recommend approximately ____ hours of sleep each night.
Example Output: eight

Example Input: Lampreys have sucker mouths with rasp-like teeth and ____ circular gill openings on each side.
Example Output:
seven