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:
Most insects have two antennae, six legs, and ____ wings.

Ex Output:
four


Ex Input:
Some animals have only ____ or three chambers .

Ex Output:
two


Ex Input:
Chipmunks feed up to ____ times a day, eating a small meal each time.

Ex Output:

six