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:
Tin has ____ allotropic forms.

Ex Output:
two


Ex Input:
Today there are ____ mating pairs.

Ex Output:
four


Ex Input:
Civets have ____ mammae.

Ex Output:

six