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: Differentiation is caused by the energy going in ____ directions.
Example Output: two

Example Input: Most logic gates have two inputs and ____ output.
Example Output:
one