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: Banks hold ____ excess reserves and the public holds no currency.
Example Output: no

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

Example Input: Older trees are more difficult to train, as bending mature branches can take one to ____ years.
Example Output:
three