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: Most insects have two antennae, six legs, and ____ wings.
Example Output: four

Example Input: Dogs can begin gundog training as early as ____ months of age.
Example Output: six

Example Input: Mast cells release ____ sets of mediators with dramatic, immediate, local and systemic effects.
Example Output:
three