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: Elephants have five toes on the fore feet and ____ on the hind feet.
Example Output: four

Example Input: Orchestra conductors live ____ to seven years longer than is usual in their societies.
Example Output: three

Example Input: Cheetahs usually eat every ____ to five days.
Example Output:
two