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:
Intermittent streams flow at least ____ months of the year.

Ex Output:
six


Ex Input:
All grays have ____ saturation.

Ex Output:
zero


Ex Input:
Cubs stay with their mothers for two to ____ years.

Ex Output:

three