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:
Wolves have ____ different types of fur.

Ex Output:
two


Ex Input:
Sexual maturity is reached at ____ years, and females calve every other year.

Ex Output:
four


Ex Input:
Earth completes a single total rotation every twenty ____ hours.

Ex Output:

four