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.

Seraphs have ____ wings, and their voices can shake doorposts and thresholds.
six

Aboriginal society is divided into ____ complementary branches.
two

Intertidal areas show a lack of large clams, resulting in a low average size for all ____ species.

four