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:
All birds have ____ legs with four toes each.

Ex Output:
two


Ex Input:
Most dens are oval shape, six to nine feet long and about ____ feet in height and width.

Ex Output:
six


Ex Input:
Postpartum depression tends to set in later after birth, and past ____ weeks.

Ex Output:

six