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.

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

Ex Output:
five


Ex Input:
Mammals have ____ cervical vertebrae, a number that remains remarkably constant.

Ex Output:
seven


Ex Input:
Smokers have ____ to four times the risk of nonsmokers.

Ex Output:

two