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: Spiders have eight legs and usually have ____ eyes.
Example Output: eight

Example Input: Sexual maturity is attained at ____ years.
Example Output:
six