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: Some children start asking questions when they're ____ or five years old.
Example Output: four

Example Input: Wood consists of ____ distinct fuels.
Example Output: two

Example Input: Spiders have only ____ body divisions and eight legs.
Example Output:
two