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: Threshold is a value to avoid ____ divide.

Output: zero

Input: Consider Input: Many ticks can live as long as three to ____ months between each stage.
Output: five