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:
Traffic lights have ____ colors.

Ex Output:
three


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

Ex Output:
two


Ex Input:
Sabers use between ____ and three jewels to give their beam a specific frequency.

Ex Output:

one