In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Example Input: Nurses are members of a global community with _ borders or boundaries.
Example Output: no

Example Input: Metals often crystallize in a _ dimensional version of the hexagonal closest packed structure.
Example Output: three

Example Input: Shock occurs when there are intense experiences and _ defenses at all.
Example Output:
no