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: Anapsids have ____ openings in the temporal region of their skull.
Example Output: no

Example Input: Green energy comes in ____ basic forms.
Example Output: two

Example Input: Cognitive therapy is a time-limited treatment lasting three to ____ months.
Example Output:
four