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: Variable stars fall into ____ major physical classifications.
Example Output: four

Example Input: Metamorphosis takes over ____ months and the froglets come out really small.
Example Output: five

Example Input: All magnetic material exists with ____ poles.
Example Output:
two