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:
Sharks have ____ gill slits on each side of the head.

Ex Output:
five


Ex Input:
Elderberry supplements seem to have few risks when used daily for up to ____ days.

Ex Output:
five


Ex Input:
Confederation involves the union of ____ or more sovereign states.

Ex Output:

two