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: Cellulose contains nothing that is considered hazardous, and carries ____ hazardous warning messages.
Example Output: no

Example Input: Respiratory therapists complete two to ____ years of education.
Example Output: four

Example Input: Scorpions have ____ parts, adding a tail to the arachnid cephalothorax and abdomen.
Example Output:
three