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: Ozone is formed of ____ atoms of oxygen.

Output: three


Input: Consider Input: Water is moved underneath the body by most or all of the ____ arms.

Output: eight


Input: Consider Input: Most insects have ____ wings, but dipterans have only two.


Output: four