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 crabs have ____ pair of chelipeds and four pairs of walking legs .

Ex Output:
one


Ex Input:
Ligand seeks ____ receptors into binding and mutual phosporylation.

Ex Output:
two


Ex Input:
Bats sleep all day and some of the night, and some hibernate for ____ or nine months of the year.

Ex Output:

eight