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: Sexual maturity is reached at ____ years, and females calve every other year.
Example Output: four

Example Input: Most bacteria have one or ____ circular chromosomes.
Example Output: two

Example Input: Kittens start hunting with their mother around ____ months of age.
Example Output:
five