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:
ATMs are expensive machines with an average useful life of ____ to fifteen years.

Ex Output:
ten


Ex Input:
Female mealybugs have only ____ nymphal stages.

Ex Output:
three


Ex Input:
Stratospheric ozone is measured using ____ different instruments.

Ex Output:

two