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: Marshes are shallow wetlands less than ____ meters deep.

Output: two


Input: Consider Input: Seraphs have ____ wings, and their voices can shake doorposts and thresholds.

Output: six


Input: Consider Input: Every person has ____ mammary arteries.


Output: two