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.

Input: Consider Input: Nitric oxide serves ____ main functions in the body.

Output: three


Input: Consider Input: Most organ systems are operational in the fetus by ____ to six months.

Output: four


Input: Consider Input: Dryness causes cessation in bacterial growth since there are ____ nutrients present to feed on.


Output: no