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.

Example Input: Cleavage is perfect in ____ directions forming rhombs.
Example Output: three

Example Input: Plants have roots for ____ main reasons.
Example Output: two

Example Input: Dunes are of ____ types - linear and parabolic.
Example Output:
two