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:
Fuzzy logic is an attempt to combine the ____ techniques.

Ex Output:
two


Ex Input:
Many countries have ____ laws against kiddie porn on the Internet.

Ex Output:
no


Ex Input:
Astronomers fall in ____ classes - professionals and amateurs.

Ex Output:

two