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:
Electric power means no gas or oil to spill, and ____ pollution in the air.

Ex Output:
no


Ex Input:
Most amphibians reach maturity at three or ____ years.

Ex Output:
four


Ex Input:
Mature Plants can grow up to ____ meters tall.

Ex Output:

three