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: Natural ytterbium is a mixture of ____ stable isotopes, with seven other unstable isotopes known.
Example Output: seven

Example Input: Significant power is observed in the magnetic field oscillations with periods of ____ minutes.
Example Output:
five