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: Substance abusers have ____ hundred percent higher medical costs and benefits.
Example Output: three

Example Input: Exposure can occur in ____ general ways, ingestion, skin contact and inhalation.
Example Output: three

Example Input: Neurologists usually divide the pain syndromes into ____ groups.
Example Output:
two