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:
Plants produce seed at ____ years of age.

Ex Output:
eight


Ex Input:
Aboriginal society is divided into ____ complementary branches.

Ex Output:
two


Ex Input:
Calipers are ____ piston units all around.

Ex Output:

two