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:
Ozone is formed of ____ atoms of oxygen.

Ex Output:
three


Ex Input:
Allergic rhinitis is the most common allergic disease, with one in ____ Canadian adults affected.

Ex Output:
five


Ex Input:
Blindness can occur rapidly, without any pain , since there are ____ nerves in the retina of the eyes.

Ex Output:

no