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: Biological islands are of ____ general types, geographical and ecological.
Example Output: two

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

Example Input: Magnets have ____ poles, north and south.
Example Output:
two