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: Urine tests are really limited in that they only look for five to ____ substances.
Example Output: nine

Example Input: Plants have roots for ____ main reasons.
Example Output: two

Example Input: All teeth typically have ____ layers.
Example Output:
three