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: Violence has no boundaries and effects every person ____ matter one's race or religion.
Example Output: no

Example Input: Amphibians have ____ legs, and often look like reptiles.
Example Output: four

Example Input: Gene flow plays a crucial role in all ____ stages.
Example Output:
three