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:
Kittens take solid food within ____ months.

Ex Output:
two


Ex Input:
Ozone is formed of ____ atoms of oxygen.

Ex Output:
three


Ex Input:
Insects have three main body parts, and ____ legs.

Ex Output:

six