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: Blisters normally burst and crust over within three to ____ days.
Example Output: five

Example Input: Comprehension is the second of the ____ elements of the informed consent process.
Example Output: three

Example Input: Most lunar months have ____ or three names.
Example Output:
two