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: Sponges are subdivided into ____ classes.
Example Output: three

Example Input: Carpenter ants can easily drop to a structure from tree limbs as high as ____ feet above the roof.
Example Output: five

Example Input: Natural tellurium consists of ____ isotopes.
Example Output:
eight