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: Cells contain ____ families of small organic molecules.
Example Output: four

Example Input: Bulbs bloom ____ to six weeks after planting.
Example Output: four

Example Input: Mathematics have many abstractions including the ____ postulates of Euclidean geometry.
Example Output:
seven