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:
Snowmobiles can accommodate ____ riders per vehicle.

Ex Output:
two


Ex Input:
Some children start asking questions when they're ____ or five years old.

Ex Output:
four


Ex Input:
Lung disease is America's number ____ killer, responsible for one in seven deaths.

Ex Output:

three