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: ATMs are expensive machines with an average useful life of ____ to fifteen years.
Example Output: ten

Example Input: Cats have five toes on their front paws, but only ____ touch the ground when walking.
Example Output: four

Example Input: Industrial halocarbons are effective ozone-depleters for ____ reasons.
Example Output:
two