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:
Sealants can normally last up to ____ years and hold up very well under normal chewing.

Ex Output:
five


Ex Input:
Cells contain ____ families of small organic molecules.

Ex Output:
four


Ex Input:
Blueberries grow in ____ varieties, lowbush and highbush.

Ex Output:

two